Microsoft Windows Error Code 0xC0000220: How to Fix It

Medium 1-2 hours Medium Severity Verified June 2026
Summarize with ChatGPTSummarize with ClaudeSummarize with Perplexity Add as Preferred Source on Google
Error Code
0xC0000220
Brand
Microsoft Windows
Product Type
operating_system
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
1-2 hours
Error code 0xC0000220 indicates that Windows encountered a mapped section alignment problem, typically preventing the system from booting. This error often occurs due to corrupted system files, a faulty memory module, or issues with hard drive sectors. Fortunately, most cases can be resolved with a few targeted troubleshooting steps.
Ad

Tools You'll Need

How to Fix Error Code 0xC0000220

  1. Restart Your Computer

  2. Boot into Advanced Startup Options

    Make sure you have a Windows installation USB or DVD ready if needed.

  3. Run Startup Repair

  4. Use System Restore

    System Restore does not affect personal files but may uninstall recently installed programs.

  5. Run Check Disk (chkdsk)

    Running chkdsk on the system drive may require a reboot. Ensure you have backed up important data if possible.

  6. Run System File Checker (SFC)

    SFC may take 15-20 minutes to complete. Do not interrupt the process.

  7. Check Memory (RAM)

    If you suspect hardware issues, back up data before testing memory.

  8. Rebuild BCD (Boot Configuration Data)

  9. Perform a Clean Installation of Windows

    This step will delete all data on the system drive. Backup first.

Parts You May Need

RAM module
Check Price on Amazon
Replacement hard drive or SSD
Check Price on Amazon
RAM module
Check Price on Amazon
Replacement hard drive or SSD
Check Price on Amazon
RAM module
Check Price on Amazon
Replacement hard drive or SSD
Check Price on Amazon
RAM module
Check Price on Amazon
Replacement hard drive or SSD
Check Price on Amazon
Ad

When to Call a Professional

If you have tried all steps including Startup Repair, System Restore, chkdsk, SFC, and BCD rebuild, and the error persists, there may be failing hardware (hard drive or RAM). A professional technician can diagnose and replace faulty components.

Frequently Asked Questions

What causes error 0xC0000220?
This error is usually caused by corrupted system files, bad sectors on the hard drive, or faulty RAM. It may also occur after a failed Windows update or improper shutdown.
Can I fix error 0xC0000220 without losing data?
Yes, most steps like Startup Repair, System Restore, chkdsk, and SFC do not delete personal files. However, if a clean installation is needed, backup your data first.
How do I boot from a Windows installation USB?
Insert the USB, restart your PC, and press the key to enter boot menu (often F12, Esc, or Del). Select the USB drive and press Enter.
Is this error caused by a virus?
It's possible but rare. Run a full antivirus scan from a bootable rescue disk if you suspect malware.
Will System Restore fix error 0xC0000220?
System Restore can fix the error if a recent system change caused the problem. Choose a restore point from before the error occurred.

Related Error Codes