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Fix Windows Defender Port Already Allocated in Windows 11 - Windows Access Denied Error Fix-Fix Windows Update 502 Bad Gateway Due to Firewall Settings

2026-06-13 18:15:25macos-help
Fix Windows Defender Port Already Allocated in Windows 11 - Windows Access Denied Error Fix-Fix Windows Update 502 Bad Gateway Due to Firewall Settings

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.