Microsoft Windows Error Code 0xC000020B: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
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Error Code
0xC000020B
Brand
Microsoft Windows
Product Type
operating_system
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Error code 0xC000020B means a program tried to use an address that Windows has closed. This usually happens when a driver or service fails or when system files are corrupted. You can fix it by restarting the affected service, running system file checker, or performing a clean boot.
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How to Fix Error Code 0xC000020B

  1. Restart the Problematic Service

  2. Run System File Checker (SFC)

    Do not close Command Prompt during the scan.

  3. Perform a Clean Boot

  4. Update or Roll Back Drivers

    Back up your data before making driver changes.

  5. Check for Windows Updates

  6. Run DISM Tool

    Ensure a stable internet connection.
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When to Call a Professional

If none of the steps resolve the error, you may have deeper system corruption or a failing hard drive. Contact a professional technician or consider reinstalling Windows.

Frequently Asked Questions

What causes error 0xC000020B?
This error occurs when a program or driver tries to access a memory address that has been closed by Windows. Possible causes include faulty drivers, corrupted system files, or incompatible software.
Can I fix error 0xC000020B without reinstalling Windows?
Yes, in most cases you can fix it by running SFC, DISM, updating drivers, or performing a clean boot. Reinstallation is a last resort.
Is error 0xC000020B dangerous?
It is not dangerous by itself, but it may cause programs to crash. It could indicate underlying system issues that need to be fixed.
How long does it take to fix error 0xC000020B?
The time varies. Simple steps like restarting a service take minutes; running SFC or DISM can take up to 30 minutes. Overall, expect 30-60 minutes.
Do I need professional help to fix this error?
Most users can fix it with the steps above. If you're not comfortable with advanced troubleshooting or if the error persists, consider contacting a technician.

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