The most common reason for BOOTMGR is missing errors, including corrupt or misconfigured system files, hard drive and operating system upgrade problems, obsolete BIOS, and loose hard drive connection cables sneak.
Another reason you see the BOOTMGR error is if your PC is trying to boot from the hard drive or the flash drive is not properly configured to boot from. In simpler terms, it is trying to boot the device from an unbootable source.
What is BOOTMGR?
BOOTMGR stands for Windows Boot Manager, which refers to a small portion of software loaded from the drive boot code. Normally, the BOOTMGR file is read-only and located in the partition’s boot directory, which is set to “Active”.
On most PC devices, the partition labeled as system will not have a drive letter. If not, BOOTMGR can be located on the main partition of your C drive. It can read boot configuration data and display the operating system selection menu.
However, sometimes BOOTMGR can be missing or lost due to incorrect boot drive, damaged MBR, outdated BIOS, loose or damaged hard drive connection cable…
How is the BOOTMGR is missing displayed on the computer?
Here are some ways that the BOOTMGR is missing error will show up on your computer screen, with the first being considered the most common.
- BOOTMGR is missing Press Ctrl Alt Del to restart.
- BOOTMGR is missing Press any key to restart.
- Could find BOOTMGR.
The BOOTMGR is missing error will show up as soon as your computer is turned on, right after the Power On Self Test (POST) process is completed. Windows operating system starts to load and a BOOTMGR error appears.
Guide 7 ways to fix BOOTMGR is missing on Windows 10/8/7
When Windows could find BOOTMGR or BOOTMGR is missing, you will try to find solutions to fix errors on the Internet. In this article, we will list 7 ways to fix the missing BOOTMGR so you can apply it right on your computer.
Restart your computer or laptop
When your Windows appears error message BOOTMGR is missing, please restart your PC by pressing Ctrl + Alt + Del keys or any key, please follow the instructions because BOOTMGR error maybe just a problem only doubt.
However, if this did not help you, go to the next solutions below.
Removing all external hard drive and USB devices
Because the BOOTMGR error can come from your computer booting from the hard drive failed, try to check if your PC is misconfigured to boot the operating system from the USB drive floppy disks or other unbootable drives.
If this is the problem, please remove the devices and make sure your BIOS doesn’t load any other devices. If not, the BOOTMGR missing issue may occur again.
Change the boot order in the BIOS
After you have pulled out the unbootable drive, the Boot Manager not found error will probably still appear on your device. In this case, you need to try to double-check the boot order in the BIOS:
Step 1: Restart your computer.
Step 2: Next, press a specific key to go to the main interface of the BIOS.
Note: This key differs depending on the brand of the computer you are using and the different Windows operating system. It can be one of the buttons F2, F8, F10, F12, Esc or Del etc.
Step 3: Then, you move to the Boot tab and modify the boot order to install the hard drive as the first boot device of the operating system.
After you’ve done restart your PC and the Boot Manager is missing error persists, go to the next solution.
Start Startup Repair from Windows Recovery Environment (WinRE)
Alternatively, you can also start Windows startup repair to perform the repair. This will find and replace missing or corrupt system files, including BOOTMGR.
How to launch Startup Repair on Windows 7
Step 1: Insert the CD and then boot your computer. If you do not have a CD, what to do, is there a way to fix the BOOTMGR is missing error without the CD? At this point, you can a USB boot from the ISO file and boot your PC from that USB drive to open Windows Recovery Environment.
Step 2: Select Startup Repair in the System Recovery Options to continue.
How to run Startup Repair on Windows 10
Step 1: Please put the Windows 10 installation disc in the machine or the USB containing the Windows 10 operating system, then restart your device.
Step 2: Press any key when the message Press any key to boot from CD or DVD appears.
Step 3: Select the language, time, keyboard and input method, then click Next, select Repair your computer.
Step 4: Click Troubleshoot on the Choose an option screen.
Step 5: Next, on the Troubleshoot screen, click the Advanced option.
Step 6: On the Advanced options screen, click Automatic Repair or Startup Repair.
Restart your computer and check if the BOOTMGR is missing error on Windows 10 has been fixed or not.
Fix boot errors and rebuild BCD
Step 1: Connect the USB containing the Windows 10 operating system to your computer and select the language you normally use and click Next.
Step 2: Click the Repair your computer button located at the bottom of the screen.
Step 3: Now, choose Troubleshoot and then Advanced options.
Step 4: Select Command Prompt (With networking) from the list of options.
Step 5: When the Command Prompt interface opens, type C: and press the Enter key.
Step 6: In the Command Prompt window, type the following commands and press Enter:
bootrec / fixmbr bootrec / fixboot bootrec / rebuildbcd Chkdsk / f
Step 7: After you have completed each command line, type Exit.
Step 8: Restart your PC to see if your computer can boot into Windows.
Step 9: If you get the error in any of the methods above, try this command:
bootsect / ntfs60 C:
Be sure to replace the drive letter with the drive letter you normally use to boot the system.
Step 10: Retry the previous unsuccessful command lines.
Check your hardware
Loose hardware connection can cause BOOTMGR is missing error. Therefore, you need to make sure these components are still connected properly. If possible, try unplugging and reinserting these components and check if the error has been resolved. Also, if the problem persists, try to find out if there’s a particular piece of hardware causing the error (such as the computer hard drive you are using).
Reinstall your Windows operating system
If none of the above solutions are right for you, and you have made sure that your hard drive is still working properly but still see the BOOTMGR is missing in Windows 10 error due to the operating system or BCD information on the hard drive has been deleted in some way. In this case, you can try a factory reset for your Windows 10 operating system.
So you already know how to fix BOOTMGR is missing in Windows 10/8/7 error. If you still have any questions, please leave a message in the comments below to let us know.