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Fix 'Run PowerShell Script Command Not Found' Error - Windows Defender Port Already Allocated Fix Guide-How to Unstick Windows Update at 100% in Safe Mode

Updated 2026-06-14 10:55:03windows-fixes
Fix 'Run PowerShell Script Command Not Found' Error - Windows Defender Port Already Allocated Fix Guide-How to Unstick Windows Update at 100% in Safe Mode
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.