Microsoft Windows Error Code 0xC000001B: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
Summarize with ChatGPTSummarize with ClaudeSummarize with Perplexity Add as Preferred Source on Google
Error Code
0xC000001B
Brand
Microsoft Windows
Product Type
operating_system
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Error 0xC000001B, also known as STATUS_UNABLE_TO_DELETE_SECTION, indicates Windows cannot properly delete a memory-mapped section. This often occurs due to corrupted system files, driver conflicts, or faulty software installations. Follow the steps below to resolve the error.
Ad

Tools You'll Need

How to Fix Error Code 0xC000001B

  1. Run System File Checker (SFC)

    Do not close the Command Prompt window during the scan.

  2. Run DISM to Repair System Image

  3. Update or Reinstall Problematic Drivers

    Back up your data before making driver changes.

  4. Perform a Clean Boot

  5. Check for Windows Updates

    Ensure you have a stable internet connection during updates.

  6. Repair or Reinstall the Affected Application

    Reinstalling may remove user data associated with the app.
Ad

When to Call a Professional

If none of the above steps resolve the error, it may indicate a deeper system corruption or hardware issue (e.g., failing RAM or hard drive). Consider contacting a professional IT technician or Microsoft Support.

Frequently Asked Questions

What causes error 0xC000001B in Windows?
Error 0xC000001B is often caused by corrupted system files, outdated or incompatible drivers, buggy software installations, or Windows update issues.
Can I fix error 0xC000001B without reinstalling Windows?
Yes, many users fix it using SFC, DISM, driver updates, or a clean boot. Reinstalling Windows is a last resort.
Is error 0xC000001B dangerous?
It is a medium-severity error that can crash applications or cause system instability, but it is not typically malicious.
Does error 0xC000001B affect all Windows versions?
It can occur on Windows 10 and Windows 11, but also on older versions like Windows 7 and 8.1.
Will resetting Windows fix error 0xC000001B?
Yes, resetting Windows (keeping or removing files) can resolve the error if other methods fail. Use the 'Reset this PC' option in Settings.

Related Error Codes