High Operating Systems ✓ Solution Verified by Community (0+ upvotes)

How to fix error error-multiple-fault-violation in Windows 11

ERROR_MULTIPLE_FAULT_VIOLATION = 640

65% success rate
👥 0+ users verified
📅 Updated: 2026-08-12
⏱️ 45 min read
Fix based on community reports and expert analysis. Last verified: 2026-08-12 · How we verify fixes
Error Codeerror-multiple-fault-violation
Affected SystemWindows 11 (Microsoft)
DifficultyHigh
Estimated Time45 min
Requires Admin Rights⚠️ Yes
Requires Reboot🔄 Yes

Solution Steps

  1. 1 Press Windows key + R to open the Run dialog. Type 'mdsched.exe' and press Enter. Choose 'Restart now and check for problems'. This runs Windows Memory Diagnostic, which tests your RAM for errors. Faulty RAM is a common cause of this error, so this step helps identify if hardware is the culprit.
  2. 2 After the memory test, if no errors are found, open Command Prompt as administrator by pressing Windows key + X and selecting 'Terminal (Admin)'. Run the command 'sfc /scannow' (we'll provide it below). This scans all protected system files and replaces corrupted ones. Corruption can cause memory access violations.
  3. 3 If SFC finds issues but can't fix them, run DISM: 'DISM /Online /Cleanup-Image /RestoreHealth'. This repairs the Windows system image, which SFC relies on. Think of it as fixing the foundation before repairing the walls.
  4. 4 Update your device drivers, especially graphics and chipset drivers. Press Windows key + X and select 'Device Manager'. Expand 'Display adapters', right-click your GPU, and select 'Update driver'. Outdated or buggy drivers can cause memory violations.
  5. 5 If the error persists, check for overheating. Download a temperature monitoring tool like HWMonitor, and ensure your CPU/GPU temps are below 80°C under load. Overheating can cause memory errors.
  6. 6 As a last resort, reset your PC: Go to Settings → System → Recovery → 'Reset PC'. Choose 'Keep my files' to reinstall Windows without losing personal data. This clears any deep system corruption.

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