Microsoft Windows Error Code 0xC0000023: How to Fix It

Easy 30-60 minutes Medium Severity Verified June 2026
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Error Code
0xC0000023
Brand
Microsoft Windows
Product Type
operating_system
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
30-60 minutes
Error code 0xC0000023 is a Windows system error that means a program tried to read or write to a buffer that is too small. This can cause crashes or prevent apps from running. Don't worry — this guide will walk you through simple fixes to get your PC working again.
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Tools You'll Need

How to Fix Error Code 0xC0000023

  1. Restart Your Computer

  2. Run Windows Update

  3. Update Device Drivers

    Back up your data before updating drivers, although rarely needed.

  4. Run System File Checker (SFC)

  5. Run DISM Tool

  6. Check for Faulty Software or Memory

    Running memory diagnostics will force a restart and take a while; save your work first.

  7. Perform a System Restore

    System Restore does not affect your personal files but may remove apps installed after the restore point.
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When to Call a Professional

If none of the steps resolve the error, especially after memory diagnostics or if you suspect hardware failure (e.g., physical RAM damage), contact a professional technician. Data loss risk increases with hardware issues.

Frequently Asked Questions

What does Windows error 0xC0000023 mean?
It means STATUS_BUFFER_TOO_SMALL — a program requested a buffer that was too small for the data it needed. This often indicates a bug in the software or driver.
Can I fix error 0xC0000023 without reinstalling Windows?
Yes, usually. Restarting, updating Windows and drivers, running SFC and DISM fixes most cases. Reinstalling is a last resort.
Is error 0xC0000023 related to hardware?
Rarely, but faulty RAM can cause buffer errors. Running Windows Memory Diagnostic can rule this out.
How do I update drivers to fix this error?
Open Device Manager, find devices with yellow exclamation marks, right-click and select 'Update driver'. You can also visit your PC manufacturer's website for the latest drivers.
Will a system restore delete my files?
No, System Restore does not affect your personal documents, pictures, or music. It only reverses system files and registry settings.

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