Windows Error Code 0xC0000005: How to Fix It

Medium 30-60 minutes High Severity Verified June 2026
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Error Code
0xC0000005
Brand
Reddit Validated
Product Type
operating_system
Severity
High
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Error 0xC0000005 is an access violation error that occurs when an application tries to read or write to protected memory. This often results from corrupted DLL files, faulty RAM modules, or outdated drivers. The error can prevent programs from launching and may crash your system.
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Tools You'll Need

How to Fix Error Code 0xC0000005

  1. Run System File Checker (SFC)

  2. Check RAM for Errors

    Back up your data before testing RAM as faulty memory can cause data corruption.

  3. Update Device Drivers

  4. Disable Data Execution Prevention (DEP) for the Faulty Program

    Disabling DEP reduces system security. Do this only for troubleshooting and re-enable it afterward.

  5. Reinstall the Faulty Application

  6. Perform a Clean Boot

  7. Check for Disk Errors

    Running CHKDSK on the system drive requires a restart and may take a long time.

Parts You May Need

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When to Call a Professional

If all steps fail and you suspect hardware failure (e.g., RAM or hard drive), contact a computer technician. Also, if you are not comfortable running system commands or modifying system settings, seek professional help.

Frequently Asked Questions

What does error 0xC0000005 mean?
It means an application tried to access protected memory, often due to corrupted system files, faulty RAM, or outdated drivers.
Can a faulty hard drive cause error 0xC0000005?
Yes, file system corruption or bad sectors can lead to this error. Running CHKDSK can help identify and fix disk issues.
How do I fix error 0xC0000005 without reinstalling Windows?
Try running SFC scan, updating drivers, checking RAM, and reinstalling the problematic application before considering a full reinstall.
Is error 0xC0000005 dangerous?
It's not dangerous by itself, but it can indicate underlying hardware problems like failing RAM or hard drive, which should be addressed promptly.
Does resetting Windows fix error 0xC0000005?
A Windows reset can fix the error if it's caused by system file corruption, but try less drastic steps first, like SFC and driver updates.

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