High
Operating Systems
✓ Solution Verified by Community (0+ upvotes)
How to fix error 0x00000109 in Windows 11
Bug Check 0x00000109: CRITICAL_STRUCTURE_CORRUPTION — The kernel detected critical structure corruption.
Fix based on community reports and expert analysis. Last verified: 2026-08-12
· How we verify fixes
| Error Code | 0x00000109 |
|---|---|
| Affected System | Windows 11 (Microsoft) |
| Difficulty | High |
| Estimated Time | 90 min |
| Requires Admin Rights | ⚠️ Yes |
| Requires Reboot | 🔄 Yes |
Solution Steps
- 1 Boot into Safe Mode: Restart and press F8 or use Shift + Restart to access Advanced Startup Options. Choose 'Safe Mode'. This loads minimal drivers and can help you run repairs without the error occurring.
- 2 Run System File Checker: Open Command Prompt as administrator (right-click Start → Terminal (Admin)). Type 'sfc /scannow' and press Enter. This will scan and repair corrupted system files. It may take 15-20 minutes.
- 3 Run DISM to repair the system image: In the same Command Prompt, type 'DISM /Online /Cleanup-Image /RestoreHealth' and press Enter. This fixes underlying corruption that SFC can't. It may take 20-30 minutes.
- 4 Check for disk errors: Type 'chkdsk C: /f /r' and press Enter. You'll need to restart to schedule the scan. This checks for bad sectors and file system errors.
- 5 Run a memory test: Press Windows key + R, type 'mdsched.exe', and press Enter. Choose to restart and check for problems. Faulty RAM can cause this corruption.
- 6 If the error persists, consider using System Restore: Press Windows key + R, type 'rstrui.exe', and press Enter. Follow the wizard to restore your PC to a previous point before the issue started.
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