Microsoft Windows Error Code 0xC00000A0: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
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Error Code
0xC00000A0
Brand
Microsoft Windows
Product Type
operating_system
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Error 0xC00000A0 indicates that Windows or an application tried to use memory that wasn't allocated. This typically happens due to software conflicts, corrupted system files, or faulty RAM. Follow these steps to resolve the issue.
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Tools You'll Need

How to Fix Error Code 0xC00000A0

  1. Restart Your Computer

  2. Run Windows Memory Diagnostic

    Save all work before restarting.

  3. Check for Driver Updates

  4. Run System File Checker

  5. Perform a Clean Boot

  6. Test RAM Hardware

    Ensure the computer is unplugged and grounded when handling hardware.

Parts You May Need

RAM module
Check Price on Amazon
RAM module
Check Price on Amazon
RAM module
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RAM module
Check Price on Amazon
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When to Call a Professional

If you've completed all steps and the error persists, especially if memory diagnostics indicate hardware failure, consult a professional technician for RAM replacement.

Frequently Asked Questions

What causes error 0xC00000A0?
It's caused by memory allocation issues, often due to faulty RAM, corrupted system files, or driver conflicts.
Can I fix error 0xC00000A0 without reinstalling Windows?
Yes, most cases can be resolved by running memory diagnostics, updating drivers, or performing a clean boot. Reinstallation is a last resort.
Is error 0xC00000A0 dangerous for my computer?
It's not dangerous, but it can cause crashes or instability. Ignoring it may lead to data loss if the system crashes during unsaved work.
How do I know if my RAM is faulty?
Run Windows Memory Diagnostic or MemTest86. If tests show errors, your RAM is likely faulty and should be replaced.
Will resetting Windows fix error 0xC00000A0?
A reset can fix it if the cause is software corruption, but not if it's hardware-related. Try other steps first.

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