The laptop does not start, writes bootmgr is missing. Bootmgr is Missing or Compressed - what to do? Check BIOS Boot Devices

09.05.2020

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Many users, since the release of the Windows 7 desktop system, have encountered a very unpleasant problem: when you turn on the computer with the message "BOOTMGR is missing Press Ctrl+Alt+Del to restart" and nothing else happened. Many people were really puzzled by this, and few people knew how to fix this error. But, in principle, this problem not as deadly and scary as it seems at first glance.

Causes of BOOTMGR is missing error

The Bootmgr is missing error is directly related to the operating system loader, that little piece of software that starts the rest Windows programs. Sometimes, it happens that for some reason the BIOS cannot find this program, as a result of which further loading of the OS is impossible and an error message is displayed on the screen. There can be a lot of reasons for this: incorrect shutdown of the computer, or BIOS settings, damage to the hard drive, or even due to malware.

To solve this problem, you need to try several options:

Check the settings in the BIOS, you may have selected the wrong boot device;
If everything is set correctly in the BIOS, you need to restore the bootmgr bootloader. This is carried out in automatic mode;
There may be an error BOOTMGR is missing, which can be fixed using the usual command line.

Check BIOS Boot Devices

This step is performed only if your personal computer has more than one hard drive. It is worth noting that it is specifically about "hard drives", and not partitions on the disk, such as C, D, E, etc. Otherwise, you simply skip this step. If you are using bootable USB drives, then you should make sure that they are not connected to the computer. It often happens that the boot occurs from the wrong hard drive. In this fad, we need to select in BIOS desired disk and download from it. Due to the fact that the BIOS shell may differ from different manufacturers, I dedicated a separate, capacious .

We fix automatically "BOOTMGR is missing"

Developers from Microsoft have finally developed a so-called recovery environment specifically for the purpose of solving problems that arise when using its OS. To start this environment, it is necessary to press the "F8" button until the error appears immediately, until the menu appears on the display on dark background.

If the menu does not appear, it will be necessary to look for a special installation disk or a flash drive with a Windows 7 system, you can also use a recovery disk. We load files from this disk or card, while not forgetting that you need to press any key, if the message “Press any key to boot from CD or DVD” is displayed on a black background. Otherwise, the installation will be performed from the hard drive, and you will again see the error that you encountered. Select "System Restore" at the bottom.

Special utility recovery will try to run a complete diagnostic of your system and detect errors like Bootmgr is missing that interfere with work. The user can only accept the proposed fixes and restart the computer.

If no visible changes have occurred, and the problem with the error remains, you will need to boot the installation disk again, then select the "System Restore" item and simply select the "Next" button in the list of available operating systems.

Click on "Startup Repair".

If everything went well, then you can be congratulated. A malfunction in the form of BOOTMGR is missing can be considered defeated!

How to solve bootloader problem via command line?

This process can be considered more efficient, but also more time-consuming. As in the previous option, first you will need to download the so-called recovery environment, but do not select the "Startup Repair" item, but click on the "Command Prompt" tab.

To understand what's going on here, you need to know that Windows installation the system automatically creates a special 100MB partition, which is reserved for the needs of the system itself. When you start the system, you will not be able to see its symbols like the letters C and D. But, this disk plays an important role, since it contains a special file, or rather the bootmgr mini-program, which is necessary to start the system. If the file breaks or for some reason does not perform the necessary functions, then the error occurs. BOOTMGR is missing. Press Ctrl Alt Del to restart". And this is where your task is to restore this file by copying it from the installation card or disk.

And this is where the black window you launched, which is called the command line, will help us. Depending on the configuration and a bunch of other parameters on different PCs, the drive letters may differ from each other, and you will need to decide from which disk and to which you will tediously copy the file.

You can check which disk it is by typing the command:

diskpart

Look at the section the size of which is 100mb and determine which letter is assigned to it.

Next, you will need to enter the commands:

1. Exit the diskpart program:

exit

2. Jump to the letter of the CD-ROM, first you must determine which letter is assigned to this partition:

And the last step is to copy the bootmgr file to a disk with a volume of 100 MB:

copy bootmgr C:\

As a result, an inscription should appear on the screen of your PC, indicating that one file was copied successfully.

There are times when, when installing the system on a pre-partitioned disk, you will not be able to find or calculate the volume of the disk, which is 100 MB. Then you just need to copy the bootmgr file directly to the root of the system data drive. If you do not want to fool yourself with determining which disk your system is installed on, simply copy the file to all disks. For example, it might look like this:

copy bootmgr D:\

copy bootmgr E:\

Reboot your PC and check the result. If it is not there, then you need to enter the following command:

bootsect /nt60 All

Restart your computer again. If the error BOOTMGR is missing has not disappeared, then there is only one possible option - the wrong disk or partition is marked as "Active".

How to make a disk active from the command line

It is important that the boot partition with the system, in addition to the bootmgr file contained in it, must also be labeled "Active", that is, from which it will be possible to boot. As we already know, in cases of erroneous labeling of the disk, the result will be sad.

We do this solution all the same from the usual command line:

diskpart

list disk

In the window you will see a numbered list hard drives that are connected to the system. Next, guided by the volume, select the disk with the installed operating system. When you have one unpartitioned disk, you don't need to guess anything. We enter the following command:

select disk 0 or 1

numbers 0 And 1 these are the disk partition numbers. After that, enter the command in the line to display the available partitions of the selected disk:

list partition

We are looking for a 100 MB partition in the list, and if you have Windows 8 installed, then you need to look for a 350 MB partition. There are times when such a section is not in the list of available ones, then you need to select the first or second, depending on which local disk C:\ or D:\ the system is installed. Next, use the command to select the partition number:

select partition 1 or 2

and make the section active:

active

exit

After entering the “active” command, an inscription will appear indicating that the partition has become active and we are rebooting the PC.

In cases where the error cannot be resolved using the above methods, the error article may help you. These two common errors are very similar to each other, and it is possible that the steps taken to resolve the problem with NTLDR is missing will be useful in resolving this problem.

For most inexperienced users who first encountered the message “bootmgr is press missing ctrl + alt + del to restart” that appeared when they turned on the computer, it seems that this “came to an end”.

Which is quite understandable: for novice users, an incomprehensible inscription on a black background seems to be almost a herald of the apocalypse, and when, after a dozen useless attempts to reboot the system, the message does not disappear, it seems that it's time to call omniscient computer masters.

However, in most cases of this error, the user himself is to blame, and he is also able to fix the problem on his own.

What does the "bootmgr is missing" error mean and how to fix it?

So, from the text of the message it follows that the system simply cannot detect the boot sector for the OS to start correctly.

Possible reasons its damage is set - from incorrect work with partitions hard drive and incorrect shutdown of the computer, before the result of damage to the system by various viruses.

Fortunately, Microsoft developers did not stay away from this problem, and offered several troubleshooting options.

Method 1

To implement this method, it is necessary to have bootable media with the operating system, since the first method involves using the capabilities of recovery tools.

In fact, any image of Windows 7 or 8 will do, even if it has nothing to do with already installed version operating system.

Using the operating system startup options (or setting the appropriate priority in the BIOS), boot Windows from the media you are using and go to the section with the "Install" button.
Go to the "System Restore" subsection.

The next window will ask you to select the operating system - select the one you need and click the "Next" button.

Next, the "System Recovery Options" window will open, in which select the first line "Startup Repair".

In the window that opens, you can see the process of identifying existing problems and automatically fixing them.
Upon completion of the scan, you should reboot and start the system in normal mode.

If this option did not help, you can try alternative way- using the "Troubleshoot your computer" option, which can be activated through the "Advanced boot options" section, opened with the "F8" button at system startup.

Method 2

The first few steps are performed in the same way as the method described above with the text "bootmgr is missing ..." only in the "System Recovery Options" window, you must select the last item called "Command Prompt".

So, this method uses a more flexible system restore tool - "Bootrec.exe.".

According to the specifics of the problem in question, you should add "Bootrec.exe." to the tool. two more options:

"/FixMbr" - is intended for making a boot record in the system partition;

"/FixBoot" - brings a new boot sector to the system partition.

If the prefix “Fix” is discarded in these parameters, then the name “BOOTMBR” will be obtained, the absence or damage of which is reported by the operating system when a malfunction occurs.

The "/FixMbr" and "FixBoot" parameters are entered and executed in turn (Enter button).

After executing the commands, you should also check the health of the operating system.

Alternatively, based on Microsoft's recommendation, you can use the "/RebuildBcd" option to rebuild the boot configuration data store.

Method 3

Like method number 2, it is implemented using the command line.

To fix the error, you will need to run the command "bcdboot c:\windows" - to create a new boot configuration.

After executing the command in the root system disk the current configuration will be saved in the "Boot" directory.

Method 4

And finally, an option that is suitable for more confident users who know how to work with the command line, since you will need to take the following steps in turn:

Also, using bootable media, go to the "Command Prompt" section;
After starting the console, enter and execute the commands "diskpart" (step 1) and "list volume" (step 2);
You will see a table with the available partitions of the disk, where hidden subsections will also be presented, where the boot sector is stored. Look for a disk marked "Reserved" and the boot / installation media itself - it may appear as "CD-ROM", be guided by the displayed volume of the disk in the "Size" column. After the search is completed, remember the names assigned to the partitions (volume and letter) and close the "diskpart" program with the "exit" command (step 3).
Using the resulting boot media letter with the OS image, enter it into the console to open and further work with him. For example, if the drive is assigned the letter "F" - to open it, enter "F:" (step 4).
Next, enter and execute the command "copy bootmgr C:\" to copy the bootloader file (step 5);
After notification of successful copying, close the disk with the “exit” command (step 6);

After performing these manipulations, the system should boot without errors. But, if the same situation occurs again, then you should open the command prompt again and execute the command "bootsect / nt60 All /".

If this did not help, then you should be patient and open the command line again: because. it follows from the repetition of the error that the disk to which the boot file was copied is not active, which, accordingly, must be corrected:

Run the "diskpart" (step 1) and "list disk" (step 2) commands in turn;
By analogy, determine the physical disk on which the operating system is installed, and execute the command "select disk 0", where instead of "0" is the number of the detected disk; (step 3)
Next, you need to view the partitions (partitions) available on the disk using the “list partition” command; (step 4)
A table will open in front of you, where all partitions of the selected disk will be displayed, in which you need to pay attention to the 100 MB partition and open it with the command “Select Partition 1” (instead of “1” - the assigned partition number); (step 5)
Finally, make the selected partition active with the "Active" command, and after notifying that "The partition is marked as active" (step 6), close it with the "Exit" command.

Conclusion

So, the above five options for solving problems with boot file in 90% of cases they solve the problem, the remaining 10% are due to incorrect implementation of recommendations and situations where nothing but reinstalling the operating system helps.

As an alternative, in situations where there is no operating system image at hand, you can use any convenient LiveCD that has similar recovery functionality, in fact, using the same tools as .

When working at a computer, system messages with the names of various errors may appear on the monitor. An advanced user will not be at a loss, but what should an ordinary user who is unfamiliar with the intricacies of computer terminology do? This is why many people get lost and do not know what to do if the BOOTMGR is missing error keeps popping up when starting the PC.

This error is quite common and quite solvable. Therefore, you should not panic at all and immediately run for help to the nearest service center for equipment repair.

In the event of such an error, instead of the normal loading of the Windows operating system and the appearance of the desktop only a black screen is displayed with the inscription BOOTMGR is missing. The line below, as a rule, says Press Ctrl+Alt+Del to restart. In translation, this means "Press the key combination Ctrl + Alt + Del to reboot the device." However, if you follow this recommendation, then the error will most likely reappear the next time you boot your computer.

Main causes of the problem

As a rule, the vast majority of computer problems when working with Windows appear due to the fault of the users themselves due to inept use computer devices or programs.

However, having certain skills in working with a PC, a person becomes much more comfortable and easier to resolve any problems that arise. And later such cases when absolutely no idea what to do, If windows error boot manager appears again and again, it becomes much smaller.

The message BOOTMGR is missing appeared on the monitor screen. What to do? Windows XP or Windows 8, 10 OS version - A computer user with any version of the Windows operating system may encounter this error. It is related directly to the Windows bootloader itself.

The Windows bootloader is a program responsible for launching various utilities at the same time as the operating system is turned on. But due to some system failure, the BIOS (BIOS) cannot find this bootloader when trying to turn on the OS and writes a message on the screen about it.

There are several reasons that can cause the error to appear:

Incorrect settings in the BIOS of the device. For example, when a user who is poorly versed in technology, who does not have the proper set of knowledge and skills, decided to randomly change the settings in the BIOS system personal computer or, for example, a laptop.
Frequent improper shutdown of the computer. For example, if the device is constantly turned off directly from the outlet when it is still working.
Too frequent cleaning of the PC from unnecessary garbage, that is, temporary files and cache. For example, we can cite the case when, due to inexperience, the user accidentally deleted some system file in order to save space, considering it unnecessary.
A serious system virus that has penetrated a device that does not have high-quality antivirus program. A virus can also appear on a computer if the user has not updated anti-virus databases for a long time.
Most serious reason the occurrence of an error is a physical damage to the hard disk. This can happen when the computer is carelessly carried somewhere or in cases of physical impact on the device, for example, strong shaking or something like that. In such situation HDD computer can be severely damaged and become unusable. To resume work on such a PC, you will need to repair or replace the hard drive with a new one.

Self troubleshooting

If the PC user roughly imagines the reason that could provoke the appearance of an error, then this will greatly simplify the task of eliminating it. To understand what to do if bootmgr is missing error in windows 7 or any other version of the OS appears regularly, it is important to make sure that the hard drive of the device has not been subjected to rough physical impact. Otherwise, you should take the hard drive of the device for repair or even completely replace it.

For other situations, when the user is sure that with hard drive okay, other methods of solving the problem will do.

Proper BIOS setup

Most advanced PC users will advise first of all to go into the BIOS of the device. It is possible that the cause of the constant occurrence of the error is an incorrectly selected boot disk. The system can boot Windows OS only from the drive on which the operating system is installed. But if the CD-ROM of the computer is selected as the boot device, and there is no disk with Windows OS in the PC, then the device will not be able to start downloading.

First of all, going into the BIOS (in some cases it is called EFI / UEFI) of the computer, make sure that in the section called Andanced BIOS Features, in the First Boot Device and similar items, those devices where the operating system is available are selected.

Most often, in the section called First Boot Device, most users select Hard Disk, and in the Second Boot Device section, CD-ROM. When you select these settings, the computer first of all will try to load operating system from a connected internal hard disk, and secondarily - through a disk inserted into the drive.

Please note: if your OS is on a flash drive or USB hard drive and you want to boot it, then this means that you should select the flash drive or USB device as the first startup device (i.e. in the First Boot Device section), not hard disk.

In addition, a system crash that causes the BOOTMGR error to appear endlessly after itself can occur after connecting a bootable USB flash drive to the computer. It is likely that the PC will try to launch the OS from it, and you have long removed the flash drive from the device or erased data containing bootable components from the flash drive.

System Restore

Another method that can help troubleshoot BOOTMGR error and similar ones, for example, when the sign appears missing MBR Helper, Invalid Partition Table, NTLDR is missing or BOOTMGR is compressed, is to launch a tool to restore the Windows system to its previous state. Many modern computers have a convenient recovery mechanism - rolling back the system state to its working mode.

To start using the built-in System Restore utility, you should restart your computer and press the F8 key on your keyboard at startup. E if everything is done correctly and a recovery utility is built into your device, a unique menu will appear. Moving through its points, you must select the line called "Computer Troubleshooting", and then press the Enter key.

It is likely that running System Restore will be sufficient and the computer will be able to repair any corrupted files on its own and eventually start up without problems.

Using the boot disk

BOOTMGR is missing Windows 7. How to fix this error using the toolkit found on a bootable USB flash drive or Windows disc.

The procedure for using this method:

Command line application

In the event that none of the proposed solution methods helps you, and the bootmgr is missing error still appears when installing from a USB flash drive, try another way to fix the computer. At first all steps must be taken from the previous method using boot disk or a flash drive, however, when the first window appears, you must select the “Command Prompt” section instead of “System Restore”.

A command line window will open. To restore the normal operation of the computer, do the following:

BOOTMGR is missing - Fix error in Windows 10/8.1/7

The first thing you should do is to extract everything from the system USB devices, including the keyboard and mouse, restart the PC and check for the BOOTMGR is missing error. If it doesn’t help, then below we will analyze ways to fix the error.

Additional advice

1 . In some cases, the problem may be in the hard drive itself. He may have already worked out his own, or he has bad sectors. In the first case, you will have to replace the disk. In the second case, you can check and fix these sectors. You need to launch a command line through the WinRE environment and enter the command chkdsk /f /r.

2 . If you can't get into Advanced Boot Options or another WinRE to run Command Prompt, Startup/System Repair, then you need to create bootable flash drive with Windows and boot from it. As soon as you reach the installation point, then click on the bottom " System Restore". This will take you to the WinRE environment or "advanced boot options".

1. Download priority

You need to go into the BIOS / UEFI and check that the first boot location is the disk on which the Windows system is installed. Restart your PC or laptop and immediately press the button DEL or F2 to get into BIOS settings. Next, you must graph Boot and select there in the first place your hard drive on which Windows. Because BIOS versions many parameter name is different, but usually it is " Boot option" or " 1st boot device". Below links will help you:

. (only you need your own drive)

2. Start recovery

You need to get into the advanced boot options. To do this, press and hold the power button on the PC for 10 seconds to turn off the PC or laptop. When WinRE mode appears, go to " Troubleshooting" > "Extra options ">"". This will perform a startup repair and also resolve the BOOTMGR is missing error. If the error still persists, you can proceed to the next step.

Note: If you can't get into the advanced options, then see the "additional tips 2" method above

3. Repair BCD or fixboot

Let's try to restore with the bootrec tool via cmd. Log back into the WinRE environment as described above and navigate to " Troubleshooting" > "Extra options" > "Command line".

IN command line enter the commands in turn, restarting the PC:

bootrec /rebuildbcd- This will restore the BCD functions, restart your PC and check if the error is resolved. If not, then enter below command.
bootrec /fixboot- This will fix all boot issues on your system.

It may be that the Windows system itself is not on the C: drive, but on another one, but it will be shown that it is on the C: drive, and when you enter the above commands, you will receive errors. In this case, please refer to this Windows guide.<--Там есть ниже видео инструкция.

4. Perform a system restore

There is also a System Restore feature in WinRE that will help you fix the BOOTMGR is missing error. Boot into advanced options as described in method 1 and navigate to " Troubleshooting" > "Extra options" > "System Restore".

Last time Windows users 7 left a lot of feedback about the fact that there is a kind of failure in the process of starting the operating system. This failure manifests itself as an error with the following content: "Bootmgr is missing. Press Ctrl Alt Del to restart". The notification indicates that the OS boot file was not found. To fix the problem, you need to follow some of the steps we have described below.

But first you need to briefly describe the current situation. At the moment the computer equipment is turned on, the search for software responsible for loading the operating system is activated on the hard disk (hereinafter referred to as the HDD). Sometimes access to this program becomes unfeasible due to its possible damage. The bootmgr is missing error can reveal itself due to several reasons:

firstly, a failure in the power supply system;
secondly, incorrect shutdown of computer equipment;
thirdly, incorrect actions in bios;
fourth, the virus.

Effective methods to fix the problem

There are three ways out of this situation:

check and make sure that the use of the boot disk in Bios is adequate;
automatic recovery of the bootloader for Windows 7;
Troubleshoot "bootmgr is missing" issue using the command line.

Checking BIOS settings

Do this step if your computer has at least two hard drives installed. We are talking about physical hard drives, and not about partitions C, D, E, etc. If you have only one hard drive installed on your computer, then feel free to proceed to the second method of solving the problem. But be that as it may, remove any storage media (flash drives, external hard drives) from the computer. Then restart your PC.

Sometimes a problem arises when, quite randomly, in bios settings the wrong disk is located. It is necessary to double-check which disk is selected. If wrong, then try to replace it with a proper disk, make it active. Then restart your computer.

Automatic troubleshooting of bootloader problem

The positive thing is that Microsoft has developed a specific recovery environment that allows you to fix many problems with the operating system, including the bootmgr is missing error. In order to launch it, you should constantly press “F8” until the notification appears until you see the corresponding menu.

If this does not happen, you need to find a recovery disk or a flash drive with an up-to-date Windows versions. Download from your existing device. When the notification appears: "Press any key to boot from CD or DVD", enter any key. If this is not done, the download will start to replay from the HDD, which will again lead to the bootmgr is missing error. Without completing the installation, at the bottom of the page, select the "System Restore" query.

Following this, the recovery utility will perform a diagnostic test on the hard drive and begin automatic search possible problems. You must then accept the troubleshooting and restart your computer.

If after the work done, you did not see any qualitative changes, then you need to resort to reloading from the installation flash drive, select "System Restore". When a list of available operating systems appears, select the one you want installed Windows and click Next.

Click on "Startup Repair".

When a successful Windows startup, then this will mean that the problem "bootmgr is missing" is solved.

Troubleshooting using the command line

The current bootmgr is missing method is a little more complicated than the previous ones, but it is the most effective. Load the recovery environment, click "Command Prompt".

During the installation process of Windows 7, a specific hidden 100 MB block is created, which is reserved by the operating system. In loaded Windows 7, it is not denoted by a letter (like other drives C or D, E or F). Despite this, the partition you create is very important because it contains a miniature program that is responsible for booting the system, containing bootmgr. When there is a problem with this file or when it disappears, a known error is generated. Therefore, it needs to be restored. This can be done by dropping it from the installation device.

It is possible to take a similar step through the command line. Simply put, the black window you recently launched. First, take a close look at the disks and find out from where and where you will have to transfer an important file. After all, the letter names of disks can be different on different devices.

enter: diskpart;
after that, write: list volume;
keep an eye on the 100 MB partition and consider what letter it belongs to.

Important! In our picture containing the sample, the corresponding disk is under the letter C.

In the same way, CD/DVD-ROM is delimited by the letter "F". "D" stands for data disc.
After that, in a clear sequence, follow these steps:

Do a close diskpart: exit request.
Change to a CD/DVD-ROM. In our sample, it is "F": F.
Copy the bootmgr file to a small disk. In our picture "C": copy bootmgr C:\.

After that, a message should appear indicating that one file was successfully copied.

However, it often happens that after writing the actual OS to a pre-partitioned disk, it is impossible to find the hidden 100 MB section. Under these circumstances, you must transfer the bootmgr file directly to the data disks. In order to simplify the task of indicating the location of the required file, as well as to prevent subsequent occurrence of the “bootmgr is missing” error, copy it to disk. For example from our picture, we are talking about device D. Thus, the following action is to be performed: copy bootmgr D:\.

Restart your PC. When there are no changes, access the command line again using the following action: bootsect /nt60 All.

Restart your computer. When there is a bootmgr is missing error, the drive is not marked as "active".

Making a disk "Active" using the command line

The disk with the boot file must include bootmgr and be listed as active. If it is in the active state, then from it, in principle, it becomes possible Windows boot. If the wrong disk is considered active, the result of the system boot will henceforth be “erroneous”.

Re-work with the command line:

Enter already known: diskpart and list disk;
You will see a list containing hard disks. From it, select the drive that stores the operating system. Perform this step, depending on the size of the disks. In the event that only one disk is installed on your computer, select it using the action: select disk 0 or 1.
After that, enter a query to view all its sections: list partition;
Look for the required section with a size of 100 MB. If you don't find a small section, choose the first or second section, taking into account which drive Windows was installed on. Decide on the section number: select partition 1 (2), and also activate the section: active, then click exit. Before the exit request is made, a notification should appear like this: "The section is marked as active."
Restart your computer.

Problem fixed. Now you know what to do and how to solve the problem with the bootloader. Work with pleasure!