Fix 'File Locked by Unknown Process' in Command Prompt - How to Reset Windows Defender Settings to Default-How to Stop Windows Security Login Loop

Updated 2026-06-14 07:33:08macos-help
Fix 'File Locked by Unknown Process' in Command Prompt - How to Reset Windows Defender Settings to Default-How to Stop Windows Security Login Loop
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.