Have you ever met an error message that the BOOTMGR is missing when you try to boot your computer? Then do you know how to fix BOOMGR?
 
For example, a user has asked a question on the Internet:
 
If someone can help me out with this problem, it’s much appreciated. I basically bought a new hard drive and connected to my laptop and now have a “Bootmgr is missing” .
 
In the beginning, let’s introduce what’s BOOTMGR.
 

What Is BOOTMGR?

 
BOOTMGR, full name boot manager, is a small piece of software that is located from the volume boot code. The BOOTMGR is a read-only file and is located in the root directory of the partition marked as Active in the Disk Management. On most computers, this partition is labeled as system reserved partition without a drive letter.
 
Then if the BOOTMGR is missing, your computer can’t boot.
 
Thus we will introduce how to fix BOOTMGR
 

How to Fix BOOTMGR Is Missing?

 
Actually, to fix BOOTMGR, we can rebuild MBR. Therefore, we need the help of a piece of third-party software. So MiniTool Partition Wizard has been the first choice of many users. With its multiple functions, it can deal with various disk and partition matters.
 
A bootable media is necessary to rebuild MBR since your computer can’t boot normally when the BOOTMGR is missing. Thus, you can purchase MiniTool Partition Wizard Pro so as to help you to create a bootable media.
 
The following two articles are useful for you to create a bootable media and boot from bootable media.
 
How to build boot CD/DVD discs and boot Flash drive with Bootable Media Builder?
How to boot from MiniTool Bootable CD/DVD Discs or Flash Drive?
 
After a successful boot, you need to how to fix the error BOOTMGR is missing.
 
Step 1: Launch the software and enter its main interface.
 
Step 2: Select the disk that contains system reserved partition and choose Rebuild MBR from the left pane or context menu.

 
Step 3: Click “Apply” to confirm this change.

 
Step 4: When all operations are finished, you can exit MiniTool WinPE loader and set your computer to boot from hard drive. Then you can reboot your computer to check whether it can boot normally.
 

Conclusion

 
In short, if you have received an error message that BOOTMGR is missing, you don’t have to reinstall a new operating system immediately since it will lead to data loss. You can use MiniTool Partition Wizard to check the system reserved partition first since not only can it avoid data loss but also it is easy to operate and convenient.