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Fix 'wuauclt: command not found' Error - Windows Update Error 0x80070643 Fix Guide-Fix Windows Defender Port Already Allocated Error in Command Line

Updated 2026-06-14 07:12:39developer-tools
Fix 'wuauclt: command not found' Error - Windows Update Error 0x80070643 Fix Guide-Fix Windows Defender Port Already Allocated Error in Command Line
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.