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Fix Microsoft Store Port Error After Reinstall - Windows Update Service Fails to Start Error 5 Guide-How to Fix Windows Defender Authentication Failed Error

Updated 2026-06-13 17:15:25browser-issues
Fix Microsoft Store Port Error After Reinstall - Windows Update Service Fails to Start Error 5 Guide-How to Fix Windows Defender Authentication Failed 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.

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