disk boot failure
Moderate
Microsoft · Windows
The BIOS found a boot device but failed to read a valid operating system from it — the boot sector or boot files on the disk are damaged or missing
Quick Answer
Error code Disk Boot Failure on your Microsoft Windows means: The BIOS found a boot device but failed to read a valid operating system from it — the boot sector or boot files on the disk are damaged or missing. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Boot from a Windows installation USB drive (create one at microsoft.com/software-download)
2
Select 'Repair your computer' > Troubleshoot > Command Prompt
3
Run: bootrec /fixmbr to repair the Master Boot Record
4
Run: bootrec /fixboot to write a new boot sector
5
Run: bootrec /rebuildbcd to rebuild the Boot Configuration Data
6
If the above fails, try: bcdboot C:\Windows /s C: /f ALL (adjust drive letter if needed)
7
Run: chkdsk C: /f /r to check for and repair disk errors
8
If none of these work, the boot region of the disk may be physically damaged — back up data using a Linux live USB and reinstall Windows
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Windows installation USB drive
Replacement drive if disk is physically failing
Related Error Codes