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Fix Windows Defender 'Cannot Connect, Permission Denied' Error - Systemd Service Setup: Step-by-Step Checklist-Windows Activation Error 0xc004c003: Fix Guide

2026-06-13 19:19:53cloud-software
Fix Windows Defender 'Cannot Connect, Permission Denied' Error - Systemd Service Setup: Step-by-Step Checklist-Windows Activation Error 0xc004c003: Fix Guide

Final checklist

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