Microsoft Windows Error Code 0xC0000009: How to Fix It
Medium 1-2 hours High Severity
Verified July 2026
- Error Code
- 0xC0000009
- Brand
- Microsoft Windows
- Product Type
- operating_system
- Severity
- High
- DIY Difficulty
- Medium
- Estimated Fix Time
- 1-2 hours
Ad
Tools You'll Need
- Windows installation media (USB/DVD)
- Administrator account
How to Fix Error Code 0xC0000009
-
Boot into Safe Mode
If you cannot access Safe Mode, you may need a Windows installation USB/DVD. -
Run System File Checker (SFC)
-
Run DISM Tool
-
Perform Startup Repair
-
Check for Driver or Software Conflicts
Be cautious when uninstalling drivers; only remove those you suspect are causing the issue. -
Test Hardware Components
Back up important data before running chkdsk if possible, as it may fix file system errors.
Ad
When to Call a Professional
If the error persists after trying all software fixes, it may indicate failing hardware (RAM, hard drive). A professional technician can run advanced diagnostics and replace components.Frequently Asked Questions
What causes error code 0xC0000009?
This error is typically caused by corrupted system files, faulty drivers, or hardware issues like bad RAM or a failing hard drive.
Can I fix error 0xC0000009 without reinstalling Windows?
Yes, in most cases you can fix it with Safe Mode, SFC, DISM, and Startup Repair. Reinstallation is a last resort.
How do I boot into Safe Mode if I can't access Windows?
Use a Windows installation USB: boot from it, select 'Repair your computer' > 'Troubleshoot' > 'Advanced options' > 'Startup Settings' > 'Restart', then press 5 for Safe Mode with Networking.
Is error 0xC0000009 a virus?
No, it's a system-level boot error, not a virus. However, malware can corrupt system files, so a virus scan is recommended.
Will resetting my PC fix this error?
Yes, a system reset (keep files option) can fix it if software corruption is the cause. Go to Settings > Update & Security > Recovery > Reset this PC.