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Windows Defender Proxy Error: Setup Checklist for Fix - How to Resolve Windows Security Service Unavailable-BitLocker Cache Full Error on Windows 11 – Solutions

2026-06-13 21:56:14developer-tools
Windows Defender Proxy Error: Setup Checklist for Fix - How to Resolve Windows Security Service Unavailable-BitLocker Cache Full Error on Windows 11 – Solutions

Final checklist

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