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Fix Windows Defender Update Failed Errors - How to Diagnose 'Connection Refused' in Windows CMD-Fix Microsoft Store Invalid Configuration Permission Denied Error

Updated 2026-06-16 17:45:47cloud-software
Fix Windows Defender Update Failed Errors - How to Diagnose 'Connection Refused' in Windows CMD-Fix Microsoft Store Invalid Configuration Permission Denied Error
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.