This problem is fairly common and relates to Windows Vista, Windows 7 and Windows 8 only
There are few ways that the “BOOTMGR is missing” error may show up on your computer, with the first error I have listed being the most common:
“BOOTMGR is missing
Press Ctrl Alt Del to restart”
“BOOTMGR is missing
Press any key to restart”
“Couldn’t find BOOTMGR”
Causes of BOOTMGR Errors
There are a number of possible causes for BOOTMGR errors, including the most common “BOOTMGR is missing” error message.
The most common reasons for BOOTMGR errors include corrupt and misconfigured files, hard drive and operating system upgrade issues, corrupt hard drive sectors, an outdated BIOS, and damaged or loose hard drive interface cables.
Another reason you might see BOOTMGR errors is if your PC is trying to boot from a hard drive or flash drive that is not properly configured to be booted from. In other words, it’s trying to boot from a non-bootable source. This also would apply to media on an CD/DVD Drive or floppy disk drive that you’re trying to boot from.
Fixes for BOOTMGR Errors
1. Restart the PC. The BOOTMGR error could be a fluke
2. Check your CD/DVD drives, USB ports, and floppy drives for media. Often times, the “BOOTMGR is Missing” error will appear if your PC is trying to boot to a non-bootable disc, external drive, or floppy disk.
Note: If you find that this is the cause of your issue and it’s happening regularly, you might want to consider changing the boot order in BIOS so the hard drive is listed as the first boot device.
3. Rebuild the Master Boot record (MBR)
Note: This fix assumes you have purchased:
REPAIR & RECOVERY DISK WINDOWS XP, Vista, Windows 7 – LAPTOP/DESKTOP
for £1.50 from our ebay store: http://stores.ebay.co.uk/nikalsystems
Please watch this video on how to perform the fix:
4. Check and reseat all internal data and power cables. BOOTMGR error messages could be caused by unplugged, loose, or malfunctioning power or controller cables.
Try replacing the PATA or SATA cable if you suspect it might be faulty.
5. Update your motherboard’s BIOS. An outdated BIOS version can sometimes cause the “BOOTMGR is Missing” error.
6. Perform a clean installation of Windows. This type of installation will completely remove Windows from your PC and install it again from scratch. While this will almost certainly resolve any BOOTMGR errors, it’s a time consuming process due to the fact that all of your data must be backed up and then later restored.
If you can’t gain access to your files to back them up, please understand that you will lose them all if you continue with a clean installation of Windows!
7. Replace the hard drive and then install a new copy of Windows. If all else has failed, including the clean installation from the last step, you’re most likely facing a hardware issue with your hard drive.