Microsoft Windows Error Code 0x00000029: How to Fix It
Medium 2-4 hours High Severity
Verified June 2026
- Error Code
- 0x00000029
- Brand
- Microsoft Windows
- Product Type
- operating_system
- Severity
- High
- DIY Difficulty
- Medium
- Estimated Fix Time
- 2-4 hours
Ad
Tools You'll Need
- Windows installation media or recovery drive
- Antivirus software
- Administrative access
How to Fix Error Code 0x00000029
-
Boot into Safe Mode
If you cannot access Safe Mode, you may need to use Windows Recovery Environment or installation media -
Run System File Checker
-
Check Disk for Errors
-
Run DISM Repair Tool
-
Update Windows and Drivers
-
Perform System Restore
System Restore may remove recently installed programs and drivers -
Reset Windows Security Components
-
Check for Malware
Parts You May Need
External hard drive or USB drive
Check Price on Amazon
Windows installation media
Check Price on Amazon
External hard drive or USB drive
Check Price on Amazon
Windows installation media
Check Price on Amazon
External hard drive or USB drive
Check Price on Amazon
Windows installation media
Check Price on Amazon
External hard drive or USB drive
Check Price on Amazon
Windows installation media
Check Price on Amazon
External hard drive or USB drive
Check Price on Amazon
Windows installation media
Check Price on Amazon
External hard drive or USB drive
Check Price on Amazon
Windows installation media
Check Price on Amazon
Ad
When to Call a Professional
Contact a computer technician if the error persists after trying all steps, if you're uncomfortable using Command Prompt, if the computer won't boot into Safe Mode, or if you suspect hardware failure. Professional help is also recommended for business-critical systems or if you lack experience with Windows recovery procedures.Frequently Asked Questions
What causes Windows error code 0x00000029?
Error 0x00000029 is typically caused by corruption in the Local Security Authority subsystem, often due to malware infections, failing hardware, corrupted system files, or incompatible security software conflicts.
Can I fix error 0x00000029 without losing my files?
Yes, most repair methods including System File Checker, DISM, and System Restore preserve your personal files. However, always backup important data before attempting repairs as a safety precaution.
How do I prevent error 0x00000029 from happening again?
Keep Windows updated, use reliable antivirus protection, avoid installing suspicious software, regularly run disk cleanup and defragmentation, and ensure your hardware is functioning properly with adequate cooling and power supply.
Is error 0x00000029 related to hardware problems?
While primarily a software issue, error 0x00000029 can be triggered by failing RAM, hard drive errors, or overheating components. If software fixes don't work, consider running memory diagnostics and checking hardware health.
Will reinstalling Windows fix error 0x00000029?
A clean Windows installation will resolve the error, but this should be a last resort. Try all other repair methods first, as reinstalling Windows requires backing up data and reinstalling all programs and drivers.