What is bootmgr?
Boot Manager or bootmgr is Windows boot sequence initially introduced in Windows Vista. It replaced the NTLDR boot manager in the earlier Windows OS versions. This service is located in OS drive, normally C:\ Drive. Bootmrg is the computer service responsible for starting your Windows OS. Boot Manager controls the boot volume to start your system and load the pre-installed OS like ‘windows.exe’ for Windows OS.
Bootmgr is only available in Windows Vista, Windows 7, Window 8, 8.1 and Windows 10. The previous version like Windows XP has NTLDR.
‘Bootmgr is missing’ error message
There are a couple of ways the computer might show this error. The most common ways are listed below:
- Bootmgr is missing
Press Ctrl+Alt+Del to restart
- Bootmgr is missing
Press any key to Restart.
What Causes ‘Bootmgr is missing’ error?
There can be a number of potential causes for the Boot Manager errors. The most common ones are:
- Corrupt files, hard drive or Operating system
- Corrupted OS Boot volume files
- Outdated BIOS
- OS upgrade issues
- Damaged hard drive interface
- Trying to boot from not configured hard drives.
The bad part about this error is that it doesn’t depend on one fixed cause, because of that you need to apply different methods on your PC to fix the error. The BIOS is unable to find the boot file in the operating system drive and displays the error in a black window or screen.
How To Fix Bootmgr Is Missing In Windows?
The Bootmgr error can possibly be an accident. Restart your computer to check if it really is the matter. If it is certainly the Boot Manager error, try the following steps.
- Check all the USB port and disk drives for media to check if any bootable drive beside the mouse and keyboard is attached to your PC. If the error on your PC is trying to boot some non-bootable external drive, detach any connected hardware except the mouse and keyboard.
- Mostly the Windows files are corrupted and don’t recall the boot volume, and that’s how the error is shown when the computer is started. If this is the case, you need to fix the corrupted Windows Boot Volume with a Windows Installer Disk or Windows Bootable USB drive. Use the version of Windows OS installed on your computer. So if you have Windows 7, 8, 8.1 use a Windows 7, 8, 8.1 installer and a Windows 10 installer for a Window 10 OS.First, boot the Windows USB or disc by Boot Menu or the Boot Sequence Priority. Know how to change boot sequence here. After booting your PC, the computer will show ‘press any key to boot from CD/DVD/USB’ to boot Windows Setup. Press any key quickly before the option disappears. Now get the Start-up repair or Automatic repair depending on your Windows OS version. After that:
- For Windows 7 and Vista:After the boot, you’ll see the Setup menu option and click on the ‘Next’ button. After that click on ‘Repair your computer’ and start the repair process. This will scan all the drives on your existing operating system. After that select, your OS version from System Recovery Options, click ‘Next’ to start the repair process. Wait for the startup repair to complete.
- For Windows 8, 8.1 and 10:After the boot, you’ll see the Setup menu option and click on the ‘Next’ button. Now click on ‘Repair your computer’ and start the repair process. After that you’ll see three option and choose ‘Troubleshoot’ and under the troubleshoot menu, choose ‘Advanced options.’ Then select Automatic Repair for Windows 8 and ‘Startup repair’ for Windows 10 to repair your PC.
- If you feel that SATA or PATA cable is the reason for Bootmgr is a missing error, try replacing it. In this case, check the HDD/SSD connection to ensure if the HDD is functional. Open computer’s BIOS, go to ‘Boot Settings’ or the page that shows the hard drives attached to your PC. When you find your HDD status, try changing the boot priority settings in PC’s BIOS. Set the hard drive as first boot device and save the changes or settings. In case you don’t find your HDD on the list, there is a chance that the connection is faulty or the hard drive is not working at all. In this case, you need to change the SATA cable or try changing slot of the SATA cable. You can also attempt on changing the power connector of the hard disk with the connectors coming from the power
- Another way to fix Boot manager problem is by using Command Prompt. This is a bit difficult method, but it is the best way to fix bootmgr You need to follow three steps to fix the error: Make Partition Active, fix Boot Files, Rebuild Boot Files. It is recommended to restart the computer after each step. Get the commands here.
- Rebuild Boot Configuration Data is similar to the Boot Partition. Not configured BCD can be a reason for bootmgr Commands are given here.
These are the ways to fix the Bootmgr successfully is a missing error on your PC. If you wish to avoid repetition of this error, it is a good option to install a cleaner or tuner in your PC this will save your OS from spam and virus attacks and other malware. Install a cleaner today to get a long error less life for your PC.