Microsoft Windows Error Code 0xC0000049: How to Fix It
Medium 30-60 minutes Medium Severity
Verified June 2026
- Error Code
- 0xC0000049
- Brand
- Microsoft Windows
- Product Type
- operating_system
- Severity
- Medium
- DIY Difficulty
- Medium
- Estimated Fix Time
- 30-60 minutes
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Tools You'll Need
- Windows installation media (USB/DVD)
How to Fix Error Code 0xC0000049
-
Run System File Checker (SFC)
-
Perform DISM Restore Health
-
Check for Corrupt Boot Configuration Data (BCD)
Running these commands can affect your boot configuration; ensure you have a backup if possible. -
Uninstall Recently Installed Software or Drivers
-
Use System Restore
-
Repair Install Windows
Ensure you have a backup of important data before proceeding.
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When to Call a Professional
If none of the above steps work, the issue may be hardware-related (e.g., failing hard drive or RAM). Consider professional help or contact Microsoft Support.Frequently Asked Questions
What does error 0xC0000049 mean?
It means Windows encountered a file or driver that is not recognized as a valid executable image, often due to corruption or compatibility issues.
Can error 0xC0000049 be caused by a virus?
Yes, malware can corrupt system files and trigger this error. Run a full antivirus scan as an additional troubleshooting step.
Will I lose data by running SFC or DISM?
No, these tools only repair system files and do not affect personal data.
Do I need a Windows installation disc to fix this error?
Not for most steps, but you'll need one for the repair install option.
Is error 0xC0000049 serious?
It can prevent Windows from booting or launching apps, but it is fixable with the steps above.