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Renew Expired Token via PowerShell: Step-by-Step - Resolve Windows Defender Proxy Issue on Windows 11-Error 0x80073cfc: Windows Security Won't Start

Updated 2026-06-13 18:47:06developer-tools
Renew Expired Token via PowerShell: Step-by-Step - Resolve Windows Defender Proxy Issue on Windows 11-Error 0x80073cfc: Windows Security Won't Start
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.