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Fix Windows Defender Update Fails with Connection Timeout Error - How to Fix Windows Activation Version Mismatch Error-Fix Windows Defender Port Already Allocated Antivirus Conflict

Updated 2026-06-13 15:17:52macos-help
Fix Windows Defender Update Fails with Connection Timeout Error - How to Fix Windows Activation Version Mismatch Error-Fix Windows Defender Port Already Allocated Antivirus Conflict
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.