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PowerShell Authentication Failed: Practical Fixes - How to Fix Windows Defender 'Command Not Found' Error-Troubleshooting Outlook Email Sending Timeouts

Updated 2026-06-16 22:17:47developer-tools
PowerShell Authentication Failed: Practical Fixes - How to Fix Windows Defender 'Command Not Found' Error-Troubleshooting Outlook Email Sending Timeouts
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.