During just one Windows startup, the system runs many processes. Accordingly, when Windows does not boot, there may be several reasons for this. Below we will look at what can cause an error when Windows startup and also fix the problem.
Hardware problems.
We will not dwell on the inoperability of the equipment, because. on your own and without the necessary skills, it is quite difficult to determine which equipment has broken down. The following are some types of errors that may indicate that the problem is related to the hardware:
1. A repeated failure of the same driver in a circle may indicate the inoperability of the device that is controlled by this driver.
2. Errors that are accompanied by a blue screen may indicate a problem with the device's RAM.
3. Various artifacts or a completely missing image speak.
5. If during boot, then this may indicate a malfunction of the power supply, motherboard, and sometimes other hardware.
Boot file corruption issues.
If during the first stages of loading Windows, the system detects the absence of important boot files, a message may appear on the screen BOOTMGR is missing. In addition, this problem can be accompanied by other messages, as well as the complete absence of any inscriptions (black screen with or without a cursor).
Bootmgr - loader operating system, which is not available ordinary users. However, users can easily format it by booting from external media. After that, the operating system will not boot.
Registry issues.
If a corrupted registry is the cause of the problem, then Windows may not even start loading. Instead, a message will be displayed on the screen that the system has failed, and you will also be prompted to use the recovery environment.
Quite often, restoring helps to load the registry from a backup and fix the Windows startup problem.
However, recovery may not always be successful, because the system may lack the necessary backups.
Troubleshooting Windows Startup Issues.
recovery environment.
Starting Windows 7 is much more convenient to resume than Windows XP, which did not have time to get a recovery environment. When installing Windows, this environment is installed on HDD, has a separate partition as well as a separate bootloader. That is why the recovery environment is not affected in any way by the problems that Windows faces.
To start the recovery environment, press the key F8 and select from all Windows boot options the item "Computer Troubleshooting" .
Next, to get into the recovery environment, the system will ask you to enter a password. If you forgot your password or do not have administrator rights, you will have to start the recovery environment from the installation disk.
1. Recovery start.
This point is worth resorting to if you do not know the exact reason for not starting Windows.
Select an item "Launch Recovery" . The system will scan and fix the problems found.
2. System recovery.
This method can be used if Windows has stopped loading after installing the program, infecting the computer with viruses, or changing the registry.
The problem will help to fix the parameter "System Restore" , but only if restore points have been saved.
The principle of operation is quite simple: you select the desired restore point, which dates back to the time when there were no problems with Windows. The system rollback will begin, after which Windows will boot normally.
3. Restoring the system image.
Applies when there are no backups saved on the computer, but you have a restore point saved on removable media.
Select an item "System Image Recovery" , and then connect the removable media containing the system image archive to your computer. Then follow the instructions of the Recovery Wizard.
4. Manual registry recovery.
It is used when the above instructions did not resolve the problem. On Windows, the registry is backed up every 10 days, so you can manually try to download the latest working backup.
From the list of available options, select "Command line" .
Type the following command into it and press the Enter key:
The standard Notepad program will start. Select in the menu program header "File" - "Open" .
Go to directory C:\Windows\System32\config
At the bottom of the window in the column "File type" change the setting to "All files" to see the full contents of that folder.
The following list of files refers to the current registry:
Default, Sam, System, Security, Software(no extension)
Each of these files must be renamed or appended with an extension .old. See the screenshot below for an example.
In the folder "config" open folder "regback" . This contains registry backups. Copy them one by one to a folder "config" .
Go back to the window "Recovery Options" and at the very bottom select the button. If the problem is due to a glitch in the registry, then Windows will start normally.
5. File recovery.
Windows has a wonderful utility that perfectly restores protected Windows files.
On the menu "Recovery Options" select item "Command line" and write the following command in it:
/scannow /offbootdir=C:\ /offwindir=C:\Windows
The "scannow" command will start a system scan, "offbootdir" specifies the letter of the system drive, "offwindir" leads to the "Windows" folder.
Please note that in the recovery environment, the drive letters may not match those seen during a normal Windows boot. Therefore, before you start scanning, be sure to launch Notepad (this process is described above) and check the drive letter of the system drive in Explorer.
6. Manual file recovery.
If the above methods did not bring the desired result, it is worth trying to manually restore the boot files, as well as overwrite the HDD master boot record.
To do this, open the menu "Recovery Options" - "Command Prompt" and run the following command, after specifying the partition letter through Notepad:
Now run the following two commands in turn:
After that, proceed with restarting Windows.
These methods help to eliminate many Windows boot errors. If the above tips did not help you, only the help of the service center remains - the problem may lie in the hardware.
Very often we encounter operating system problems. The question is especially unpleasant when Windows 7 does not start at all. But let's take a closer look at everything. In order to correctly and reliably understand this issue, it would be good to study its main components.
After all, this problem does not happen by itself. In the article, we will also tell you what to do to try to quickly restart Windows 7 (if possible).
And so, let's go.
The operating system (OS) Windows 7 and its predecessors are very popular, a huge amount of money is spent on their development. Despite this, it happens that often they do not work quite stably or do not want to start at all.
At what, it would seem, you didn’t do anything special at the computer, but Windows is unstable and incorrect. Well, since a lot of important and necessary information is usually stored on a computer (), a sudden interruption in work can bring a lot of trouble.
The computer has to be carried in for repair, and there is a chance of losing all important information on the hard drive (as a result, if you try to solve the problem yourself). And these are usually both working documents and educational documents, ranging from electronic lectures to coursework and a host of other important files.
Almost everything lost (deleted) can be recovered, read more about this service in the article recover data. Therefore, you should never hope that "it will carry me."
It is important to understand that many problems can be avoided by treating the operating system correctly.
One of the reasons is the inability to boot due to damage to the OS registry, as a result of which it cannot boot and follows the instructions, i.e. reboots in the hope that the next boot will fix the problem.
The situation, of course, is not easy, in order to understand it, it is worth knowing the possible reasons for its appearance.
The simplest thing you can immediately try to do is, when loading the OS, in the menu that appears, select - launch the last known good configuration. This method, although not often, can help, it sends the OS to the last successfully saved point in order to boot from it.
It activates like this: Press F8 key when booting PC. Thus, a black screen with command lines should appear in front of you. We select the launch of the last known known good configuration we need:
As a result, there will be a reboot and an attempt to boot from the last successfully recorded version of the system in which everything worked stably. It doesn't always help. So, if it doesn't work, then read on.
Next, we can use a method such as "safe mode", i.e. booting windows 7 in safe mode. This mode is turned on again when the computer is booted with the F8 key, or rather, the selection menu only appears there. This is where we select "safe mode" at the top.
What gives this mode. And it allows us to boot the OS without drivers, i. almost clean operating system:
Albeit not often, but the reason why Windows 7 is not loaded can be banal dust or oxidation of contacts, i.e. take it and just get it - insert all computer connectors such as mice, keyboards, video cards, monitors, etc. And blow them out or brush them with a brush or something.
Quite often, cleaning the parts from dust, you can restore the normal operation of the PC
The next method sends us inside the system unit. It has a motherboard on it all the details of the computer are attached - a processor, a video card, etc. And on this motherboard, if you look closely, there is usually a battery on the bottom that stores the computer's boot settings when it is turned off from the outlet.
You just need to take and get the battery, wait about a minute and put it back, of course, this must be done with the wire turned off from the outlet. Otherwise, the settings will not change. This method can help in many situations, so don't neglect it. Also, do not forget that if the time and date on the computer get lost, then simply replace this battery. Buying it is easy, just come to any "battery store :)" and say - please give me a flat 2032 battery - this is exactly what you need. All things.
Here on the site there is a lot of information on this issue in case the OS no longer starts and you have to reinstall it. In general, in most cases, this is the most reliable way in which you can get a new high-quality and fast working Windows.
True, do not forget that only an experienced master can reliably carry out this process. If you decide to use the services of such a master, then just contact us using the contacts in the header of the site. Don't worry, we're not saying that only we can do it, not at all.
If you can also reinstall and set up Windows well, then that's just great. But it often happens that the user does not have such an opportunity, so for this case we offer our services so that you can restore the PC as quickly and reliably as possible.
And so we have analyzed the main ways of how you can try to get out of the situation when for some reason windows 7 does not start. Many more different factors can influence the launch, we have analyzed the most basic ones. We recommend that you contact our service for quality assistance and get the fastest stable working computer or laptop.
Greetings to all. Usually, if you have problems starting the operating system or turning off the light during operation, the next time you boot the system, a list of possible launches appears.
In order not to mislead you and teach you some of the nuances, I will share some very useful tips. So, if the system did not boot but provided a boot choice, then I recommend choosing the following option - Last Known Good Configuration or Load Last Known Good Configuration.
A similar start option will cancel any changes made to the registry key CurrentControlSet that directly caused the problem.
This registry key determines the values of hardware settings as well as all drivers installed on the system. Function loading last known good configuration will replace the contents of the above registry key with the data stored in the backup that was used during the last successful start of Windows.
We restart the computer. After the beep, press the F8 key and hold it until the menu for selecting the start of the operating system appears. From the list of launch options that appears, select and activate it by pressing the key "Enter".
Remember, you are given one single attempt to restore the system's Last Known Good Configuration.
In general, if you failed to restore the system after starting the OS from the mode, then this means only one thing - the backup is damaged. In this case, this recovery method will not help us.
This method involves using the utility "recovery console". The more complex the problem of loading the operating system, the more serious the approach to solving it should be. The bootable CD with the installation system usually contains a very useful utility - "Recovery Console"
To autorun a bootable Windows CD, place it in the DVD-CD drive and restart your computer. As soon as the computer restarts, the drive starts reading data from the disk, you will see the setup and installation wizard dialog box.
This will happen if you are in the BIOS settings in boot priority Boot first device You put "DVD/CD-ROM". I wrote more about this in the article -. Once the download starts, follow all the instructions that appear on the screen.
The program will give you a choice of main files to launch the installer. The installation wizard greets you with the phrase "Welcome To Setup". Now it remains to press the key "R" which facilitates the opening of the recovery console.
Now the Recovery Console dialog box has opened in front of you. Here we will see a folder with files as well as a request to select the operating system with which you plan to start working.
Next, you have to press the number key corresponding to the operating system number, then the program will ask for the administrator password, if any. Well, now you have full access to command line.
I wrote more about how to work with the recovery console in the article -
At the initial stage of starting Windows OS, the Ntldr program accesses the boot file Boot.ini. As a result, the program determines the location system files and available options to continue downloading.
That's it for this, in case of damage to the boot file Boot.ini, the operating system cannot continue or even start loading correctly.
In the event that Windows does not boot and the reason for this is a damaged file Boot.ini then the toolkit element of the recovery console will help you - Bootcfg.
To start it Bootcfg you will of course need to start the system from the Windows XP boot disk. To run a command Bootcfg, you need to enter in the command line of the management console: Bootcfg /parameter
Where /parameter- this is one of the functions that I will tell you about now.
Add- performs a scan hard drive for all installed operating systems. In addition, it adds identifiers for new operating systems to the boot file. Boot.ini.
Scan- scans the hard drive for all installed operating systems.
List- displays a list of records in a file Boot.ini.
Default– displays the identifier of the operating system that, during startup,
Rebuild- completely restores the Boot.ini boot file. The user is given the opportunity to control each step.
Redirect– in administration mode, this function allows you to redirect the execution of download operations to another dedicated port. It has several subparameters, or rather two: | ./Disableredirect - Disables redirection.
It is worth noting that boot.ini is formed differently in Windows Xp and Windows 7. On the topic of boot.ini for XP and 7, I wrote several articles:
The master boot record uses the first sector of the hard drive and performs the boot procedure for Windows XP. The entry has a table of all available hard disk partitions and a small program "primary loader" The primary loader, in turn, is responsible for placing the active or boot sector in the partition table.
At the end of the placement in the table, the boot sector starts the start of the operating system. If suddenly the boot record is damaged, then the active sector will not be able to start the system.
To fix this problem, the Recovery Console provides the Fixmbr program. We boot from the installation disk and activate the recovery console.
In order to run the Fixmbr command, you need to enter in the command line of the management console: Fixmbr
Where
- Compound name of the drive that needs to create a new master boot record. The composite name for the main boot drive C:\ will take the following form: \Device\HardDisk0
The boot sector is a small section of the hard drive reserved for storing data in the operating system, having the NTFS or FAT32 file system, and it is also a rather small program that helps in the process of booting the operating system.
In the event that the system refuses to start precisely because of the inoperability of the boot sector, the recovery console tool can help you Fixboot. To do this, you need to load the installation disk and go to the recovery console menu.
In general, I have already indicated above how to do this. In order to run this program, you will need to enter the following in the command line of the management console: Fixboot :
Where- the letter of the drive that requires the creation of a new boot partition.
In the event that it is not possible to start the system and you do not have a backup copy, it is possible to execute Quick reinstall Windows.
This procedure involves reinstalling the operating system in the same directory (similar to updating the old version of the system to a newer one) and can fix almost any Windows boot problem.
Place boot disk into the DVD/CD drive, then restart your computer. After the disk is recognized and reading starts, you can begin the installation procedure. During installation, a license agreement will appear.
In order to agree to the terms of the agreement, press the F8 key. Next, the program will scan all installed versions Windows. As soon as at least one of the versions is found, the installation screen will appear.
In order to start restoring the version of the system you need, click "R", and to start the installation Esc. The system restore procedure will start. The installation wizard will now start checking the disks for health and then begin a quick reinstallation.
Remember, after reinstalling or recovering a damaged installation, all updates will have to be reinstalled again.
As a rule, in the event of an error during stable operation of the system, the operating system automatically reboots.
When an error occurs directly at system startup, a cycle of endless reboots occurs. In this case, you need to disable the automatic system restart on failure.
At the beginning of the operating system startup or after POST, press the F8 key, which will open the menu in front of you "Extra options".
Next, select the item "Turn off automatic reboot on system failure" and activate it by pressing the key "Enter". Now, at startup, Windows XP will display an error message, the essence of which will tell us about the malfunction.
Restoring the Windows operating system from a backup.
If none of the system recovery methods helped you, then there is a chance to restore the operating system using a backup copy (if you have one).
The recovery algorithm depends entirely on the program you are backing up with, which provides you with all the necessary instructions.
Conclusion
Both recovery methods and reasons why Windows does not boot can be many. The main thing is that the system is basically recoverable and you do not have to perform. That's all. I wish you good luck with the problem.
Professional Computer Help specialists will tell you what you can do on your own when Windows XP does not turn on.
In this article, we will briefly present the worst-case scenario, when the operating system does not boot at all. This can be caused either by a hard disk failure that caused an error loading system files, or by an error in a particular driver or service.
The first thing to try is to boot Windows in safe mode. To do this, when starting the computer, after the initial BIOS diagnostics, press and hold the "F8" key. From the on-screen menu that appears, select Safe Mode. If you plan to work with the network and you are sure that the network adapter or network drivers are not the cause of the problem, select Safe Mode with network drivers loading. If Windows was able to boot into safe mode, then the cause of the problem is in some driver or service. However, in the most catastrophic Windows case may refuse to boot even in protected mode. If you know the name of a file or driver that is interfering with Windows boot, you can disable it. To do this, insert the Windows XP installation disc into the optical drive and boot the operating system from the CD (do not forget to select boot from the optical drive in the BIOS settings of your computer). When the first installation window appears on the screen, press the "R" key to enter the menu Windows recovery xp.
In the next window, you will be prompted to select the copy of the operating system that you want to restore. If you have only one version of Windows XP installed, press the "1" key and then the "Enter" key.
Next, you need to enter a password Windows Administrator xp. After the operating system boots and the standard command prompt appears on the screen, type listsvc and press the Enter key. The screen will display a list of all running services and information about their status.
Try to find the name of the file responsible for the error in this list. Next, enter the disable service_name command, where service_name is the name of the service that you know is responsible for the problems with Windows boot. If this method did not help, or you did not find the specified file in the list of services, or the file name is not known at all, then the last option remains - recovery by booting Windows from the installation CD. However, keep in mind that in doing so, you may lose data in the All Users, Templates, Default User, and some other folders. In addition, startup shortcuts and the Windows main menu may be lost, as well as data in the Shared Documents folder. You can solve this problem by using a backup copy of this and other important data for you. Of course, provided that you regularly back up data. So, boot from the Windows XP installation disc. Then select the version of Windows you want to restore and press the "R" key. The installer will check the disks for corruption and proceed to copy files that are missing or corrupted from the hard drive. After the recovery is complete, it is recommended that you install all Windows updates and, if necessary, reactivate the operating system.
At any time, you can type Help and see a list of available commands. You can type Help command_name to get help on a specific command. For example, type help attrib to get help on the attributes command. At any time, you can exit the Windows Recovery Console by typing Exit at the command prompt. Commands often save:
FIXBOOT fixboot drivename: This command writes a new Windows boot sector code to the system partition. In the command syntax, drive_name is the drive on which the boot sector will be written. This command fixes corruption in the Windows boot sector. It overrides the default settings that are written to the system boot partition. The fixboot command is supported on x86-based computers.
FIXMBR fixmbr device_name This command is used to restore the master boot record of a boot partition. In command syntax, device_name is an optional device name that requires a new Master Boot Record (MBR). Use this command if a virus has corrupted the boot record and you cannot start Windows.
ATTENTION!!! Using the fixmbr command can damage the partition table, which can lead to the loss of important information. Using this command can create inaccessible partitions. All actions described here may result in the loss of information, so it is better to contact specialists!!!
Facing an “Operating System Not Found” error while booting up your computer can be nerve-wracking. But, if you have 7 installed, then you have nothing to be afraid of. After all, such boot errors can often be resolved with just a few simple steps.
In many cases, the inability to boot Windows 7 may simply be due to an incorrectly set boot order in the BIOS. This can happen if you have more than one hard drive installed in your computer. Typically, you enter the BIOS a few seconds after turning on the computer by pressing the button Delete or by pressing a special function key. After entering the BIOS, make sure that your Windows 7 hard drive is in the correct place in the boot queue. If you do not know where to look, read the instructions for your motherboard.
Another possible reason for your computer not detecting Windows during boot is a hardware problem. If the BIOS cannot detect your system drive, then make sure that all cables are connected to it properly. If your hard drive is making strange noises like clicking and tapping noises, then it might be broken. And finally, it's possible that your hard drive is having data corruption issues with important system data like the Master Boot Record (MBR).
If you suspect your drive is failing, it's a good idea to back up important data, scan it for errors from another computer, and even consider purchasing a replacement drive. Trying to fix a boot problem on a damaged drive can result in data loss, so back up your data before you do anything.
The MBR and other important boot data can also be corrupted by attempts to install earlier versions of Windows other than Windows 7 (like Windows XP) or by third programs such as viruses. In the case of a virus, before any “corrective” actions, it is recommended to check the disk with an antivirus program. Otherwise, attempts to repair a disk with a virus may result in data loss.
Also, the appearance of messages about corrupted boot data can be caused by an incorrect setting of the active disk partition, which may come from an overly inquisitive Windows user with administrative rights.
Fixing MBR and other Windows 7 boot problems is most quickly done using a Windows 7 installation DVD. But if you don't have one, you can alternatively use a Windows 7 system repair disc, which we'll show you how to create below.
If you don't have an installation DVD or a recovery disc, then do yourself a big favor by creating a recovery disc now to avoid unnecessary headaches in the future.
Step one: Turn on your computer by booting from either the Windows 7 Setup DVD or the Windows 7 System Recovery Disc. Keep in mind that you may need to change the boot order in the BIOS to boot from the DVD.
Step two: When booting from your installation disc or recovery disc, you may be asked to select a language. Select it and then proceed with the download. If using the installation DVD, when prompted below (or similar in another language), select Repair your computer.
Step three: It will take some time for the computer to search for installed Windows, after which you will be provided with a list of possible recoverable Windows. Choose the appropriate setting and proceed. If, by chance, a problem is discovered in one of your Windows installations at this initial stage, then the system may ask you if you would like it to automatically fix it. Here you can decide for yourself - whether to let the system fix itself or not? If you don't want automatic fix, then simply select "no" (No).
Step four: When you reach the System Recovery Options screen shown below, you will be presented with a list of choices that can help you recover your corrupted Windows 7
If you wish, you can first try the Startup Repair option, which in automatic mode often solves many boot problems. However, in this article, we will use the command line option (Command Prompt) to solve our problems manually. Therefore, click on Command Prompt to continue.
Step five: Being at the command prompt, type the following command and press Enter:
In case of its successful completion, you will see a corresponding welcome message, such as “The operation completed successfully”. This is what you need! Your MBR has been restored!
Although the above command fixes the MBR (and sometimes it is enough), there may still be an error with the boot sector of the system partition and with the boot configuration data - Boot Configuration Data (BCD). This can happen if you tried to install another operating system besides Windows 7, such as Windows XP. To write a new boot sector, try the following command:
If your Windows 7 is still not detected when you boot your computer, or you want to include more than one operating system in your system boot list, try the following command to rebuild your BCD:
bootrec.exe /RebuildBcd
The above command will scan all your drives for other Windows 7 compatible operating systems and allow you to add them to the system boot list. If this does not work, then you may need to backup your old BCD folder and create a new one with the following commands:
bcdedit /export C:\BCD_Backup
c:
cd boot
attrib bcd -s -h -r
ren c:\boot\bcd bcd.old
bootrec /RebuildBcd
Some users simply delete the old download folder and try the steps above to resolve their download issues. But this is not recommended.
After deliberately changing the active partition on our system drive during system boot, we encountered a BOOTMGR loss error (BOOTMGR is missing), which prevented us from loading Windows. This is a common error that occurs when you start “playing” with partitions on your system drive. And her decision can cause a serious headache if you do not prepare for it in advance.
To change the active partition back, use your Windows 7 recovery disc or installation DVD and follow the steps below.
Step one: Follow the steps in the description above (one through four). This should take you to the Windows Recovery Environment Command Prompt.
Step two: Type DiskPart and then press Enter.
Step three: Type List Disk and press Enter. This command will list all drives connected to your computer and assign them numbers.
Step four: Type Select Disk x, where x is the number of the disk containing the partition you want to make active. Press Enter.
Step five: Type List Partition and press Enter. This will allow you to see a list of partitions on the selected drive. Decide which section you want to make active.
Step six: Type Select Partition x, where x is the number of the partition you want to make active. Press Enter.
Step seven: Now just type Active and press Enter. This command will make the section you selected active.
Windows 7 makes it easy to create your own system recovery disc, provided you already have the operating system up and running.
Step one: Click on the Start button -> Programs-> Maintenance -> Create System Restore Disk.
Step two: Insert a blank CD or DVD into your optical drive.
Step three: Click on the create disc button and let the program do its job.
What you need! The program only needs to write 140-160MB of data to disk (depending on the type of operating system), which should only take a few minutes. If you don't have a CD/DVD-R optical drive that you can use to create a recovery disc (and to use it later), you can download an ISO image with a Windows 7 system recovery disc and then use it to create bootable USB flash drive.
Step one: Download the Windows 7 system recovery disk image ().
You will need a torrent client to download. Alternatively (if you have a DVD drive), you can use the Windows 7 installation disc or the Windows 7 system recovery disc. In this case, you should skip directly to the seventh step.
By the way, using the Windows 7 installation disc in the seventh step, you can not only restore the system, but also install Windows 7 from a USB drive, which can be very useful if you are a netbook user.
Step two: Open a command prompt with administrator rights. To do this, click on the Start button -> Programs -> Accessories -> right-click on Command Prompt and select Run as administrator.
Step three: After confirming all UAC prompts, you should be at the command prompt. Make sure your USB stick is connected to your computer, then type DiskPart and press Enter.
Step four: Type List Disk and press Enter. Find out which number corresponds to your USB stick. In our case, the USB flash drive corresponds to Disk 1. We determined this by the capacity of the flash drive, which we have at 2GB.
Step five: Enter the commands below in order, changing the disk number to your own. Warning - executing the commands below will erase all data on your USB flash drive or drive of your choice.
Select Disk 1
clean
Create Partition Primary
Select Partition 1
Active
Format FS=NTFS
Step six: After DiskPart has successfully formatted your USB flash drive (which may take a few minutes), you need to enter the following commands:
Step seven: Now you need to copy the contents of the ISO image (or DVD) you downloaded to your USB stick. It's just a couple of folders and a file. To extract files from an ISO image, you need some kind of program, like.
Step eight: Now that the files have been copied, you need to make your USB stick bootable. To do this, you need to download a small file. This file can also be found in the boot directory of the Windows 7 installation disc. After downloading, place bootsect.exe in the root folder of your USB stick.
Step nine: Back at the command line, you need to change the current directory to the root directory of the USB stick. In our case, the flash drive corresponds to the letter E, so we will use the following commands:
e:
bootsect /nt60e:
The bootsect command will add a compatible boot code to the specified volume. If all goes well, you will receive a bootable, recovery USB flash drive. True, when using it, do not forget that it must be specified in the BIOS boot list.
Many users of computers and laptops must have encountered problems when downloading Windows 7. The operating system simply refused to boot and gave an error. In such cases, it is impossible even to enter Safe mode on F8.
The first thing that comes to mind in such situations is reinstalling Windows itself. The procedure is simple and well described in the manuals:, Windows installation 7 and many others.
Reinstallation will solve the problem with loading the system, but I don’t want to lose documents, programs, I don’t want to set everything up again, installing drivers and applications, as well as setting them up, can take a lot of time.
Comment: this guide does not cover hardware problems such as problems with turning on the laptop itself, problems with the image, and so on.
Fortunately, the system boot problem can be solved more easily. Usually bootloader corruption is the cause of system boot problems. Windows, disruption MBR. To restore the system, you need to restore this same bootloader and MBR. How to do this will be described below.
MBR and bootloader recovery process Windows 7 almost completely identical to that of Windows Vista. This means that the recommendations described below can be safely applied to recovery. Windows Vista.
Let's start. First of all, we need a boot disk or flash drive with the distribution Windows 7. How to prepare them is described in detail in the manuals: Installing Windows 7 from a USB flash drive to a laptop, netbook or regular PC
Now it is worth choosing System Restore at the bottom:
This will start searching for installed copies of Windows on your hard drive:
As a result, the wizard should find the installed Windows 7. Select it and click Further:
The Windows Recovery menu should appear:
Consider what each item is for:
The first two points are of interest to us, as well as the last. First consider Launch Recovery. This is the easiest way to restore normal system boot. Let's launch it. Diagnostics should run:
After a while, the problem will (or won't) be fixed:
Consider now the second menu item - System Restore. Let's try to restore the system from restore points. To do this, we run System Restore:
Now select the last restore point and click Further:
Click on Ready agree with the warnings:
Restart your laptop or computer.
P.S. It is far from always possible to solve the problem using the methods described above, therefore, you will have to start analyzing the text of the error message that appeared during PC startup and look for alternative options.
A message with the text "BOOTMGR is missing" indicates that the boot loader of the Windows 7 operating system is corrupted or missing. To solve this problem, you will need a Windows 7 installation disc or an ERD Commander disc (32bit or 64bit, according to your OS), which can be found in. In the "Boot device priority" section of the BIOS settings, set the CD / DVD drive as the first boot device. Then boot from the Windows installation disc and select the "System Restore" menu item. From the list of installed operating systems (if you have several), select the one you need and click the "Next" button. In the "System Recovery Options" window that appears, there are two items - "System Startup Repair" and "Command Prompt", and you will need them. The first option will automatically fix the problem with the start of the operating system, and if it fails, you will have to turn to the second. At the command line, type "bootrec /rebuildbcd", press "Enter" and agree to make changes to the boot configuration data by alternately pressing the "Y" and "Enter" keys. After that, it remains only to create a new boot sector using the console command "Bootrec / FixBoot" and restart the computer.
As a result of erroneous compression of the Windows 7 boot files partition, the message "BOOTMGR is compressed" may appear. The ntfs.sys file system driver, which is responsible for working with compressed disk partitions, starts acting much later than the Bootmgr.exe loader. In this case, you will again have to turn to the help of the Windows 7 installation disk, on the command line of which you need to sequentially execute a series of commands:
The "NTLDR is missing" error indicates that the NTLDR file, which is the Windows XP bootloader, is corrupted or missing. Unlike BOOTMGR in Windows 7, which is stored in a separate hidden partition, the NTLDR file is located on the same drive as the operating system. It happens that inexperienced users mistakenly take system files with unknown names for malware and without a doubt delete them. Such a fate often befalls the innocent NTLDR, as well as another file critical for successful OS boot - ntdetect.com. To solve the problem, you will need a Windows XP installation disc. At the very beginning of the boot process, you must press the "F10" key to get into the recovery console. With it, you need to go to the Windows installation disk using the "X:" command, where X is the letter of the corresponding optical drive. Then it remains only to copy the two missing files to the hard drive partition with the OS by running the commands:
This method is also effective in case of loss of any other system files, copies of which can be found on the Windows 7 and XP installation discs, respectively. The "NTLDR is compressed" error is rare, as it only affects Windows XP computers without SP2. It can occur when too many files are stored in the root of the C: drive. A similar problem with compression of the NTLDR bootloader is solved in the same way as if it was damaged or deleted - by copying the original file from the Windows XP installation disk.
Error message that appears "No bootable device" and its many variations (“Boot device not found”, “Invalid boot device”, “Non system disk or disk eggor”, etc.) indicate that the computer did not even start the operating system, since does not see the boot sector or even the hard drive. To understand where the problem lies - at the software or hardware level, just go to the “Boot device priority” section of the BIOS settings that we already know. If the hard drive is not among the suggested options, then the problem is related to the hardware. The SATA or IDE cable or hard drive power cable may have come off, or the HDD has failed. If the computer normally recognizes the hard drive, the reason is software in nature and lies in the master boot record (MBR) - either damaged or missing. Unlike the fixes discussed above, this situation is relevant for both Windows 7 and XP. After booting from the installation disk, run the command in the recovery console: "bootges / fixmbr" (for Windows 7) or "fixmbr" (for Windows XP).
Windows critical error messages, which are called "BLUE Screens of Death" (Blue Screen of Death) because of the background color, are quite common problems in Windows XP, but in Windows 7 they tried to make the system more reliable in this regard. Cause BSoD there may be malfunctioning hardware, such as RAM. Most often, early boot BSOD messages appear after updating device drivers and contain the text "DRIYER_IRQL_NOT_ LESS_OR_EQUAL" along with the file name with a SYS extension. To remove the problematic driver through the "Device Manager", you can try starting Windows in safe mode, because it uses a minimal set of drivers. To do this, press the "F8" key during the OS boot and select the "Safe Mode" item. If when booting in safe mode " blue screen death" still appears, you need to return to previous version driver with no problems. This can be done using a restore point, if it was created earlier. In Windows 7, for this you need to press the "F8" key during the OS boot and select the "Troubleshoot your computer" item in the menu that appears. After that, you will be taken to exactly the same "Recovery Options" menu as when using the Windows installation disc. Next, the item "System Restore", in which you can select one of the available points for rollback.
An error like "Windows could not start because the following file is missing or corrupt: Windows\System32\filename.dll" is specific to the Windows XP operating system. It can be caused by a corrupted or missing Boot.ini boot configuration file that is not used in the new version of the OS. You can solve the problem using the "bootcfg / rebuild" command in the Windows XP Recovery Console, which will correct the existing or create a new Boot.ini file. The absence of other files in the system, primarily drivers with the SYS extension, happens in both Windows 7 and XP. Most effective method to solve the problem - return the file to its place by searching for its copy on the Windows installation disk, borrowing it from another computer with the same OS version, or searching for the file by typing its name in any Internet search engine. If you do not have a second PC at hand, then you will need a LiveCD with an OS that does not require installation to search, download and copy files. One of the most convenient options is. The exceptions are the system registry files System, Software, SAM, Security, and Default, which are stored in the C:\windows\system32\config folder. You cannot replace them with copies from another computer, so the only option is to roll back to a restore point. In Windows XP, for this, you must first load the operating system with at least standard registry branches, and only after that start the OS regeneration process. To do this, go to the Windows XP Recovery Console, as described above, and run a series of commands (let's take the System registry file as an example):
The cause of many problems with booting Windows can be bad sectors of the hard disk (bad blocks). The MHDD program, which runs from the disk, will help you check the hard drive (the image can be downloaded from the link). In the program menu, select the hard disk number from the list and start scanning sectors for errors and fixing them - “Remap | ON". Bad blocks (broken blocks) are usually concentrated at the beginning of the hard drive, so it's worth moving the partition with the OS away from the problem area. For this, a boot disk with the MiniTool Partition WIZard NOT partition editor is suitable. (in the program menu, select "Partition 1 Move/ Resize"). BSOD can be related to RAM as well. A free application allows you to test RAM modules
There are at least three common errors that lead to problems loading Windows 7. When an error occurs, the system displays a short message on the monitor screen that indicates a problem. It is these small instructions that we will be guided by when solving the problems that have arisen.
Perhaps the most popular error is Disk boot failure, insert system disk and press Enter
It is characterized by the following situation: you turn on the computer, but instead of the usual loading of the operating Windows systems 7, this inscription is displayed to you. It means that the system recognized the disk from which it starts as a non-system one, that is, according to Windows 7, there are no system files necessary to start it on this disk. This can be caused by various reasons. Let's take a look at the most common ones.
Possible variant. A DVD-ROM has been inserted or a USB flash drive has been inserted and your BIOS is configured to default to one of these media. As a result, the system cannot find the files it needs to run on a USB flash drive or DVD and reports an error.
Elimination. You should try to disable absolutely all external drives: phones, memory cards, flash drives and external drives. After that, the computer should be turned on again. Most likely, the system will start correctly this time.
It may be that the recommendations provided above will not help. In this case, you need, firstly, in the BIOS settings, set your system disk as the default startup device. And secondly, you should make sure that the BIOS detects your system disk at all. It may be that he is out of order.
If the system correctly displays the system disk, it is in your power to use it. We will touch on this a little later, at the end of the article.
If the system does not display your primary hard drive, you can try unplugging it and plugging it back in, or into a nearby slot if one is present.
Other problems can also lead to this error, for example, viruses, etc. In any case, it is best to first check the methods that we mentioned. Most likely they will work. If not, then feel free to ask at the end of the article, in which we indicated a step-by-step troubleshooting of Windows 7 problems using the utility.
BOOTMGR is missing error
Due to this error, you will also not be able to start Windows 7 correctly - black screen message - BOOTMGR is missing. This problem can also be caused by various reasons, including all kinds of viruses. It can be caused by the erroneous actions of an inexperienced user who accidentally changed the boot record of the hard drive. Also, physical HDD problems are often the cause of this error.
Elimination. Check if the hard drive itself on which the system is installed is working. Seek help from the Windows 7 Recovery Environment, which is discussed below.
NTLDR is missing error. Press Ctrl + Alt + Del to restart
This problem manifests itself in almost the same way as the previous one. To fix it, you should also use the troubleshooting environment.
When starting Windows 7, the user observes only a black screen and a mouse pointer
If the usual desktop with the start menu does not load when the system is started, and all we can see is the mouse pointer, then everything is not so difficult and in the vast majority of cases it is easy to fix. Very often this error occurs if you got rid of some serious virus with the help of an antivirus program, which has already managed to make troubles and these same troubles were not fully corrected by the antivirus program.
Elimination. Restart your computer and as soon as the mouse pointer appears, press Ctrl + Alt + Del. Task Manager will immediately appear.
In it, you need to select the "File" menu in which to create a new task (execute). A dialog box will appear, in it you should enter the regedit command and press Enter. This will launch the Windows 7 System Registry Editor.
We will need to view the sections in the editor:
HKEY_LOCAL_MACHINE/Software/Microsoft/Windows NT/Current Version/Winlogon/
- HKEY_CURRENT_USER/Software/Microsoft/Windows NT/Current Version/Winlogon/
Now you need to edit the value Shell.
With the first section, make sure the Shell option is set to Explorer.exe If not, then install it yourself. In the second case, you need to go into the section and see: if there is a Shell entry in it, then it must be deleted from there. Now it remains to close the registry window and simply restart the computer. Everything should fall into place.
And so, everything that we could not eliminate on our own, we eliminate using standard system utilities
In most cases, if there are problems when starting the operating system, we can see the Windows 7 recovery screen. It is he who will help us in restoring the system startup. If the recovery screen does not appear on its own, then the next time the system is rebooted, we can call it on our own by pressing the key F8. Select "Computer Troubleshooting" from the menu
You will see a message that will contain information that the system files are being loaded, you will also be asked to select a language.
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