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Windows Defender Real-Time Protection Won't Turn On: Fixes - Fix 'Port Already Allocated' Error in Windows Defender on Windows 10-Resolve Windows Defender Real-Time Protection Rate Limit

2026-06-13 13:34:30developer-tools
Windows Defender Real-Time Protection Won't Turn On: Fixes - Fix 'Port Already Allocated' Error in Windows Defender on Windows 10-Resolve Windows Defender Real-Time Protection Rate Limit

Final checklist

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

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