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Windows Defender Error 504 Setup Guide - Resolve PowerShell Script Execution Policy Blocked-Fix WireGuard Handshake Failures from Firewall

2026-06-13 14:16:05developer-tools
Windows Defender Error 504 Setup Guide - Resolve PowerShell Script Execution Policy Blocked-Fix WireGuard Handshake Failures from Firewall

Final checklist

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