Have you got “BOOTMGR is missing. Press Ctrl+Alt+Del to restart” error message? If so, read this post to know how to fix missing BOOTMGR in Windows 7/8/10.
Have you encountered such an issue: after starting up your PC, the computer window pops up an error message “BOOTMGR is missing? Press Ctrl+Alt+Del to restart”? Once you received such an error, you know your computer fails to boot due to missing BOOTMGR.
Usually, when this issue appears in Windows 7/8/10, you get the above message. In addition, there are two errors to show missing BOOTMGR: “BOOTMGR is missing. Press any key to restart” or “CDBOOT: Couldn’t find BOOTMGR“.
When this issue appears, some of you are curious: what is BOOTMGR? What does it mean when the computer says Bootmgr is missing? As a matter of fact, BOOTMGR refers to Windows Boot Sequence Manager which is first introduced in Windows Vista. It replaces NTLDR in Windows previous versions. When restarting your computer, this program runs to load the operating system from the hard drive. Once it gets missing, Windows will be unable to boot.
So, after learning so much information about BOOTMGR, do you know what the reasons for this issue are? How can you fix missing BOOTMGR in Windows 7/8/10?
Why Is BOOTMGR Missing ?
Generally speaking, Boot Manager missing issue happens due to six main causes. For example, BOOTMGR files are misconfigured and corrupted so that MBR is damaged; your computer is set to boot from a non-bootable hard drive; BIOS is outdated; hard disk interface cables are loose; there are some system update issues; disk bad sectors exist… All those factors are likely to lead to BOOTMGR loss. Once this issue happens, the important thing should be to find some ways to solve it and ensure your computer runs normally. So, how can you fix missing BOOTMGR error in Windows 7/8/10?
How to Fix BOOTMGR Is Missing Error :
Usually, once BOOTMGR gets missing, most of you will search the solutions on the internet and here we summarize eight ways to you.
- Remove All Removable Devices
If your computer is set to boot from a floppy drive, a flash drive, an optical drive or other non-bootable devices in BIOS, Windows will remind you “BOOTMGR is missing” message. In this case, please enter BIOS and then check whether your PC doesn’t boot from one of them. If it is set by mistake, please remove all removable devices.
- Modify Boot Order
If you have removed the non-bootable disk, but still fail to boot with missing BOOTMGR error, it is likely that the boot order is incorrect. Please check the boot sequence by entering BIOS and ensure the first boot device is the disk with the operating system.
- Update the Motherboard BIOS
In addition, outdated BIOS is one of the reasons for BOOTMGR missing issue. Please make sure your BOIS is upgraded to the latest version.
Tip: The BIOS must be compatible with your computer. How to update BIOS? Click this post to learn more.
- Do Windows Startup Repair
If the above three ways are not useful to solve this issue, you can use a Windows repair CD disc to do Windows startup repair. In Windows 7, please enter “System Recovery Options” window, and choose “Startup Repair”.
In Windows 8/10, click Troubleshoot > Advanced options > Automatic Repair(Win8) or Startup Repair(Win10).
- Check All Internal Power Cables
Loose, unplugged or faulted power cables probably cause missing BOOTMGR issue. Please reset all data and power cables. If there is a faulty one, you should replace it with a new cable.
- Fix MBR
If you have tried all the above ways but still can’t boot your computer, try to repair Master Boot Record (MBR). How to do this job? Actually, it is very easy, just use a piece of professional partition manager software. Here we recommend MiniTool Partition Wizard Professional to you, which provides you with “Bootable Media” feature with you. This feature can be used to create a bootable device and then boot your computer when the system fails to boot. After booting your computer from the bootable device you have created, select the target disk and then click “Rebuild MBR”. Finally, click “Apply” to make this operation effective.
- Mark Partition Active
After trying to fix MBR, if BOOTMGR is missing issue still appears, please try to mark the correct partition active since you probably have set an incorrect partition active. In order to do this work, MiniTool Partition Wizard still can help by its “Set Active/Inactive” feature.
- Test Bad Sectors
If all these ways are not useful, you should consider whether there are some bad blocks on your hard drive. Please use MiniTool Partition Wizard “Surface Test” feature to check disk bad sectors.
If bad sectors are found, you must replace this bad one with a new disk and then make a clean Windows installation.
Now we have introduced you eight solutions to BOOTMGR is missing issue in Windows 7/8/10. Just try them. When searching this issue online, we have found an article Fix BOOTMGR Is Missing Error on PC in Windows 7/8/10 which shows more detailed ways. Hope you can quick fix the Boot Manager missing issue.