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How to Fix Error Code 0xC0000005 in Windows

✅ Quick Answer

Error 0xC0000005 is an Access Violation error in Windows. It occurs when applications try to access protected memory or when system files are corrupted. Common causes include faulty RAM, corrupted registry entries, malware infections, outdated drivers, or incompatible software. Fixing this error typically involves updating drivers, running memory diagnostics, repairing system files, checking for malware, and adjusting application compatibility settings.

❓ Why Does Error 0xC0000005 Occur?

This error often appears due to:

Faulty or incompatible RAM modules
Corrupted system files or registry entries
Malware or virus infection
Faulty drivers or outdated software
Application conflicts or compatibility issues

🔧 Fix 1: Run Memory Diagnostic

Press Windows + R and type mdsched.exe, then press Enter.
Select Restart now and check for problems.
Windows will restart and scan your RAM for errors. If errors are found, consider replacing the faulty RAM.

🛠 Fix 2: Update or Reinstall Drivers

Press Windows + X and select Device Manager.
Expand categories and identify devices with outdated or faulty drivers.
Right-click the device → Update driver.
If updating doesn’t help, uninstall the driver and reinstall the latest version from the manufacturer’s website.

💻 Fix 3: Scan and Repair System Files

Open Command Prompt (Admin).

Run the following commands one by one:

sfc /scannow
DISM /Online /Cleanup-Image /RestoreHealth

Restart your computer after the scan completes.

⚙️ Fix 4: Check for Malware

Use Windows Security or any trusted antivirus software to run a full system scan.
Remove any detected threats.
Restart the system and check if the error persists.

🔧 Fix 5: Adjust Application Compatibility

Right-click the program causing the error and select Properties.
Go to the Compatibility tab.
Enable Run this program in compatibility mode for: and select an older Windows version.
Also, check Run as administrator.

❓ Frequently Asked Questions

Will replacing RAM fix the error?

If memory tests indicate faulty RAM, replacing it usually resolves the error completely.

Can software conflicts cause 0xC0000005?

Yes, incompatible applications or outdated programs can trigger access violation errors.

Is this error dangerous?

It is not harmful to hardware but can cause application crashes, system instability, or data loss if not resolved.

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Last updated: January 2026 • Techfix&Guides