How to Restart Windows Defender Threat Service - How to Fix Permission Denied and Version Mismatch in Windows Defender-Fix PowerShell 404 Not Found Errors

Updated 2026-06-15 20:12:57windows-fixes
How to Restart Windows Defender Threat Service - How to Fix Permission Denied and Version Mismatch in Windows Defender-Fix PowerShell 404 Not Found Errors
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.