4 Solutions To Fix Bootmgr Is Missing Windows 11

Sometimes, you may encounter a Windows boot problem: Missing BootMGR. This can happen when your computer is shut down abruptly without going through the normal shutdown process. However, you might have a virus that has corrupted the BOOTMGR file or altered its entry.

The Boot Manager file (BootMGR) is usually located on the drive where your operating system is installed. We can refer to this drive as the "System Drive," which contains all the system files. The BootMGR file is one of these system files.

If you encounter this issue, it's probably due to the bootMGR file being misconfigured, overlooked, crashed, or corrupted for various reasons. Upon restarting your computer, you'll find the bootmgr file missing, without which your device won't be able to boot.

Great! Now that you're familiar with the BootMGR error, scroll down to learn quick ways to fix the Missing BootMGR error in Windows 11!

1. Solution 1: Run Startup Repair from the Windows Recovery Environment (WinRE)
2. Solution 2: Rebuild the Boot Configuration Data (BCD) from WinRE
3. Solution 3: Perform a System Restore from WinRE
4. Solution 4: Fix the Master Boot Record

Users with earlier versions of Windows can refer to this page to solve the same problem on their computers: How to Fix BOOTMGR is Missing in Windows.

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Solution 1: Run Startup Repair from the Windows Recovery Environment (WinRE)

This problem can occur if your BOOTMGR file is corrupted or missing. A Startup Repair can fix any corrupted or missing files, including BOOTMGR. See the instructions below on how to run a Startup Repair on your computer:

Start the repair on Windows 11:

Step 1: First, insert the bootable Windows 11 installation media and boot your computer/PC.

Step 2: When you see the prompt, press any key, and then quickly press any key again to boot from the CD or DVD.

Step 3: Select a language, time and currency format, keyboard or input method, and then click on the "Next" button. On the next screen, click on "Repair your computer."

Step 4: On the Choose an option screen, click Troubleshoot. Then, on the Troubleshoot screen, select Advanced options.

Step 5: On the Advanced Options screen, click on Automatic Repair or Startup Repair.

Restart your computer and see if you've successfully fixed the missing BOOTMGR issue in Windows 11. If not, proceed to the next solution.

Solution 2: Rebuild the Boot Configuration Data (BCD) from WinRE

The "BOOTMGR is missing" error can be caused by incorrect or corrupted BCDEdit settings. The bootrec.exe tool is an application that comes with the Windows Recovery Environment (WinRE) and helps you diagnose and fix Boot Configuration Data (BCD) and Master Boot Record (MBR) issues. Follow these steps to recreate the BCD from the Windows Recovery Environment (WinRE):

Step 1: Insert the Windows installation CD into your computer, boot from the CD drive, and click “Repair your computer.”

Step 2: Click on "Troubleshoot" > "Advanced options" > "Command Prompt," and type C: then hit Enter.

Step 3: Next, in the CMD prompt, enter the following commands one by one and press Enter:

The command "bootrec /fixmbr" translates to "Repair Master Boot Record" in Chinese. It is a command used in the Windows operating system through the Command Prompt for system recovery, which is used to repair or replace a damaged Master Boot Record (MBR).

"Bootrec /fixboot" is a command in the Windows operating system used to fix the boot sector. In Chinese, it translates to "修复引导扇区." This command is typically used when there are problems with the system booting or the boot record is corrupted.

The command "bootrec /rebuildbcd" translates to "Repair Boot Configuration Data" in Chinese. It is a command used in the Windows operating system to scan for all installed operating systems on the hard disk and rebuild the BCD (Boot Configuration Data) store, resolving booting issues.

"Chkdsk /f" is a Windows command that's used to check and correct disk errors. In Chinese, it would be translated as: "使用修复功能的chkdsk命令". In this command, the "/f" flag instructs chkdsk to fix any issues it encounters.

Step 4: After you finish each task, type exit, and then restart your computer. It should now boot and run normally.

Solution 3: Run System Restore from WinRE

If System Restore is enabled on your PC, you can try performing a system restore in the Windows Recovery Environment (WinRE) to fix the missing BOOTMGR issue in Windows 11.

Step 1: Boot from your Windows installation disc and look for the System Recovery Options, just like in Solution 1. This time, choose “System Restore.”

Step 2: Follow the System Restore Wizard to select the correct restore point.

Step 3: Finally, click “Finish” to restart the system.

That's all the possible solutions to fix the BOOTMGR is missing error due to various reasons. Hopefully, these methods work for you. If you're looking for a faster and data-loss-free solution, we recommend that you skip to the last solution to fix this error.

Solution 4: Repair the Master Boot Record

There's few things more unsettling than turning on your computer and seeing an error message that says “Operating System Not Found,” or simply a blank screen with no indication of what's wrong. Sometimes, you might accidentally damage the Windows Master Boot Record (MBR), which keeps your system from starting up. In this case, rebuilding the MBR is much easier and quicker than reinstalling Windows.

The partition manager tool includes the function to fix MBR when it causes failure to boot. Compared with manual solutions, the partition software – Partition Master provides the easiest way to fix MBR. It contains a feature called "Rebuild MBR". If the MBR (Master Boot Record) is corrupted, you can use this feature to fix it without damaging the partition table.

An MBR repair tool makes it easy to fix MBR errors on hard drives, external hard drives, or USB flash drives in Windows and Windows Server operating systems. You just need to install the partitioning software on your computer, and with a few clicks, the MBR will be automatically repaired.

Features of MBR Repair Tool:

• Convert MBR system disk to GPT without data loss
• BitLocker Partition
• Schedule 'Shut Down' / 'Hibernate' after execution

Step 1. To create a bootable Disk Partition Master tool, you will need a storage medium such as a USB drive, flash drive, or a CD/DVD disc. Connect the drive properly to your computer.

Step 2: Launch AOMEI Partition Assistant, and then click "Make Bootable Media" on the left side.

Step 3: When the drive is detected, you can choose between USB or CD/DVD. However, if you don't have a storage device at hand, you can also save the ISO file to your local drive and burn it to a medium later. After making your choice, click on the "Create" button to start the creation process.

• Read the warning, and then click Yes.

Step 4: When it's done, a dialog box will ask you if you want to restart your computer from the bootable USB drive.

• Restart Now: You want to restart your computer immediately and boot into the disk-partitioning tool on the bootable media, without an operating system in the way.
• Finished: You don't want to restart your current computer, but instead want to use the bootable USB drive on a new one.

Note: To boot from the live disk on a new computer, you will need to restart the target computer and press F2/F8/DEL to enter the BIOS, and then set the USB bootable disk as the first boot device.

Wait patiently as your computer boots from the USB boot media and into the WinPE tool desktop.

Conclusions

On this page, we explain what MBR is, what happens if the MBR is damaged, and when you need to fix it. We also provide a handy list of practical solutions to repair MBR in Windows 11.

For a quick fix, you can try MiniTool Partition Wizard. It repairs the MBR in a simple and effective manner, allowing your computer to restart.

How to Fix Common MBR Issues: A FAQ

< strong > 1. What is Rebuild MBR?

Rebuilding the Master Boot Record (MBR) is a way to fix a corrupted MBR partition table and restore the boot code so your computer can load and start Windows again.

This issue can also be resolved by reinstalling Windows, but that's a more complicated and time-consuming process, especially for those who aren't comfortable with such procedures. Rebuilding the MBR is simpler and faster.

As a partition tool, MiniTool Partition Wizard has the function of rebuilding MBR. You can fix the problem of corrupted MBR with several clicks.

2. Will deleting the MBR delete data?

If the MBR is deleted, the entire hard drive and its contents become inaccessible. You cannot typically access or view it directly through Windows File Explorer or Disk Management. It also doesn't allow for direct updates or changes to the operating system to make it bootable.

3. Where is the Master Boot Record (MBR)?

When you first install Windows, the MBR is created on the first partition that you make. The Master Boot Record is the first 512-byte sector on your hard disk.