Microsoft Windows Error Code 0xC0000079: How to Fix It

Easy 15-60 minutes Medium Severity Verified June 2026
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Error Code
0xC0000079
Brand
Microsoft Windows
Product Type
operating_system
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
15-60 minutes
Error code 0xC0000079 indicates a malformed security descriptor in Windows, often preventing programs from starting or causing system instability. This issue usually stems from corrupted system files, driver problems, or malware. Follow these steps to resolve it.
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Tools You'll Need

How to Fix Error Code 0xC0000079

  1. Run System File Checker (SFC)

    Do not close the Command Prompt window during the scan.

  2. Perform a DISM Scan

  3. Scan for Malware

    Ensure your antivirus definitions are up to date before scanning.

  4. Check for Windows Updates

  5. Restore Security Defaults Using Command Line

    Be careful not to reset permissions on system folders.

  6. Perform a System Restore

    This will undo recent system changes but your personal files will remain intact.
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When to Call a Professional

If the error persists after all steps, or if you are uncomfortable using Command Prompt, consider contacting a professional technician. They can perform advanced repairs or reinstall Windows safely.

Frequently Asked Questions

What causes error code 0xC0000079?
This error is caused by a corrupted or malformed security descriptor, often due to faulty system files, malware, driver issues, or incomplete Windows updates.
Can I fix error 0xC0000079 without reinstalling Windows?
Yes, in most cases you can fix it by running SFC and DISM scans, scanning for malware, and checking Windows updates. Reinstallation is rarely needed.
Is error 0xC0000079 dangerous?
It is a medium severity error that can prevent programs from running, but it does not directly harm your hardware. However, it may indicate underlying issues like malware that should be addressed.
How long does it take to fix this error?
Most fixes take 15-60 minutes, depending on the scan times. SFC and DISM scans can take up to 30 minutes each.
Do I need a Windows installation disc to fix this?
No, the steps above do not require a disc. If you need to repair system files, Windows can use online sources via DISM.

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