Microsoft Windows Error Code 0xC000000A: How to Fix It

Medium 1-3 hours High Severity Verified June 2026
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Error Code
0xC000000A
Brand
Microsoft Windows
Product Type
operating_system
Severity
High
DIY Difficulty
Medium
Estimated Fix Time
1-3 hours
Error code 0xC000000A (STATUS_BAD_INITIAL_PC) indicates that Windows encountered an invalid start address during boot. This often stems from corrupted system files, faulty RAM, or a failing hard drive. This guide will help you diagnose and resolve the issue.
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Tools You'll Need

How to Fix Error Code 0xC000000A

  1. Launch Automatic Repair

  2. Run System File Checker (SFC) and DISM

    Do not close the Command Prompt window prematurely. Wait for each command to finish completely.

  3. Check Disk for Errors

    This process can take a long time (hours) on large or failing drives.

  4. Test Your RAM

    Back up your data before replacing hardware.

  5. Perform a System Restore

    System Restore will not affect your personal files, but may remove recently installed apps.

Parts You May Need

RAM module
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Hard drive/SSD
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RAM module
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Hard drive/SSD
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RAM module
Check Price on Amazon
Hard drive/SSD
Check Price on Amazon
RAM module
Check Price on Amazon
Hard drive/SSD
Check Price on Amazon
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When to Call a Professional

If automated repair, SFC, disk check, and RAM test fail, the hard drive may be failing or the motherboard may have issues. Consult a professional technician for hardware replacement.

Frequently Asked Questions

What causes error 0xC000000A in Windows?
It is usually caused by corrupted system files, a failing hard drive, faulty RAM, or a damaged boot configuration.
Can I fix error 0xC000000A without a Windows installation disc?
Yes, if you can access Advanced Startup Options by pressing F8 (or Shift+Restart) at the login screen. Otherwise, a bootable USB is required.
Will I lose data when fixing this error?
Most steps do not delete personal files, but there is always a risk. Back up important data if possible.
How do I create a Windows installation USB?
Use the Media Creation Tool from Microsoft's website on another PC. You'll need an 8GB+ USB drive.
Is error 0xC000000A the same on all Windows versions?
Yes, it appears on Windows 7, 8, 10, and 11 with the same meaning and similar fixes.

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