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Windows Defender Failed to Start: Manual Malware Check Guide - How to Set Up OneDrive Sync on Windows and Mac-Fix PuTTY Connection Refused After Server Restart

Updated 2026-06-13 21:34:08cloud-software
Windows Defender Failed to Start: Manual Malware Check Guide - How to Set Up OneDrive Sync on Windows and Mac-Fix PuTTY Connection Refused After Server Restart
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.