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Fix 'Windows Defender Command Not Found' in Windows 10 - How to Check Which Process Is Using a Port in PowerShell-Troubleshooting Windows Terminal Update Failure 0x800f0954

Updated 2026-06-14 03:19:42office-tools
Fix 'Windows Defender Command Not Found' in Windows 10 - How to Check Which Process Is Using a Port in PowerShell-Troubleshooting Windows Terminal Update Failure 0x800f0954
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.

More repair notes

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