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Windows Activation Error 0xc004c003: Step-by-Step Fix - Windows Defender Threat Service Stopped: Step-by-Step Checklist-WireGuard Handshake Not Completing? Check Firewall

2026-06-13 11:46:58
Windows Activation Error 0xc004c003: Step-by-Step Fix - Windows Defender Threat Service Stopped: Step-by-Step Checklist-WireGuard Handshake Not Completing? Check Firewall

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.

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