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How to Fix 'Outlook Data File Cannot Be Opened' Error - Fix Windows Defender High CPU: Step-by-Step Guide-Troubleshoot Windows Update Connection Timeout

Updated 2026-06-13 12:53:08office-tools
How to Fix 'Outlook Data File Cannot Be Opened' Error - Fix Windows Defender High CPU: Step-by-Step Guide-Troubleshoot Windows Update Connection Timeout
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.