Microsoft Windows Error Code 0xC0000260: How to Fix It

Easy 30-60 minutes Medium Severity Verified June 2026
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Error Code
0xC0000260
Brand
Microsoft Windows
Product Type
operating_system
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
30-60 minutes
Error code 0xC0000260, or STATUS_INVALID_BUFFER_SIZE, occurs in Microsoft Windows when a program tries to use a buffer that is too small or too large for the data being processed. This can cause applications to crash or fail to start. The fix involves checking for corrupted system files, updating drivers, and adjusting software settings.
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Tools You'll Need

How to Fix Error Code 0xC0000260

  1. Run System File Checker

  2. Update Device Drivers

    Ensure you have a stable internet connection to download drivers.

  3. Check for Windows Updates

  4. Reinstall the Affected Application

    Back up any important data related to the app before uninstalling.

  5. Perform a Clean Boot

    This temporarily disables non-Microsoft services; you can reverse later.
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When to Call a Professional

If the error persists after all steps, you may have deeper system corruption or hardware issues. Consider contacting a professional technician or Microsoft support.

Frequently Asked Questions

What causes Windows error 0xC0000260?
This error is caused by an invalid buffer size, often due to corrupted system files, outdated or faulty drivers, or a problematic application.
Can I ignore error 0xC0000260?
No, ignoring it may lead to application crashes or system instability. It's best to troubleshoot as soon as possible.
Does error 0xC0000260 mean my computer is damaged?
No, it's typically a software issue. However, persistent errors could indicate hardware problems like faulty RAM.
How do I prevent error 0xC0000260?
Keep your system and drivers updated, avoid installing unreliable software, and run regular system file checks.
Is there a quick fix for 0xC0000260?
Running the System File Checker (sfc /scannow) is often the fastest first step. If that doesn't work, try updating drivers.

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