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Fix 'Authentication Failed' Errors in Windows Server CMD - How to Delete a File That Is in Use-Windows Defender Real-Time Protection Won't Stay On

Updated 2026-06-14 22:44:44developer-tools
Fix 'Authentication Failed' Errors in Windows Server CMD - How to Delete a File That Is in Use-Windows Defender Real-Time Protection Won't Stay On
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.