Causes of BOOTMGR ErrorsThere 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, an outdated BIOS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 IDE 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 optical drive
or floppy drive
that you're trying to boot from.
Fixes for BOOTMGR Errors
- Restart the PC. The BOOTMGR error could be a fluke.
- Perform a startup repair of Windows. This type of installation should replace any missing or corrupt files, including BOOTMGR. Continue troubleshooting if this does not resolve the issue.
- Check your floppy and optical drives for media. Often times, the "BOOTMGR is Missing" error will appear if your PC is trying to boot to a non-bootable floppy disk or CD/DVD.
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.
- Check the hard drive and other drive settings in BIOS and ensure they are correct. The BIOS configuration tells the computer how to use a drive so incorrect settings can cause problems, including BOOTMGR errors.
Note: There's usually an Auto setting in BIOS for hard disk and optical drive configurations which is usually a safe bet if you're not sure what to do.
- Reseat all internal data and power cables. BOOTMGR error messages could be caused by loose or malfunctioning power or controller cables.
Try replacing the PATA or SATA cable if you suspect it might be faulty.
- Update your motherboard's BIOS. An outdated BIOS version can sometimes cause the "BOOTMGR is Missing" error.
- 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, understand that you will lose them all if you continue with a clean installation of Windows.
- Replace the hard drive and then perform a new installation 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.
BOOTMGR Errors Apply To
BOOTMGR issues apply to Windows 7 and Windows Vista operating systems only. Windows XP does not utilize BOOTMGR. The equivalent function in Windows XP is NTLDR
Whish you the best luck.