Microsoft Windows Error Code 0xC0000206: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
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Error Code
0xC0000206
Brand
Microsoft Windows
Product Type
operating_system
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Error code 0xC0000206, also known as STATUS_INVALID_BUFFER_SIZE, occurs in Windows when a program or driver requests a memory buffer with an invalid size. This can cause crashes or blue screens. The good news is that it's usually fixable with built-in Windows tools and a few hardware checks.
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How to Fix Error Code 0xC0000206

  1. Run System File Checker (SFC)

  2. Run DISM Tool

  3. Update Device Drivers

  4. Check for Windows Updates

  5. Test Your RAM

    Back up any unsaved work before restarting, as the test will reboot your PC.

  6. Perform a Clean Boot

Parts You May Need

RAM module (if faulty)
Check Price on Amazon
RAM module (if faulty)
Check Price on Amazon
RAM module (if faulty)
Check Price on Amazon
RAM module (if faulty)
Check Price on Amazon
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When to Call a Professional

If the error persists after all steps, or if you find hardware errors during memory testing, you may need a professional to replace faulty RAM or diagnose deeper hardware issues. For data recovery, consult a specialist.

Frequently Asked Questions

What does error 0xC0000206 mean in Windows?
Error 0xC0000206 (STATUS_INVALID_BUFFER_SIZE) indicates a program or driver requested a memory buffer of an invalid size. It often appears during system crashes or when launching certain applications.
Can error 0xC0000206 be caused by faulty RAM?
Yes, faulty RAM can cause this error. Running Windows Memory Diagnostic (mdsched.exe) can help identify if your RAM is the issue.
How do I fix error 0xC0000206 without reinstalling Windows?
You can try running SFC and DISM scans, updating drivers, and performing a clean boot. These steps often resolve the error without needing a full reinstall.
Is error 0xC0000206 a virus?
No, this error is typically caused by corrupted system files or driver issues, not malware. However, running a security scan can rule out infections.
Will a Windows update fix error 0xC0000206?
Microsoft occasionally releases patches that address stop codes like 0xC0000206. Keeping Windows updated can help prevent and fix this error.

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