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How to Fix Windows Security Update Failed Error Code - WireGuard Handshake Failure: Configuration Check Guide-Windows Defender Error 0x80073b01: How to Fix

2026-06-13 15:47:42office-tools
How to Fix Windows Security Update Failed Error Code - WireGuard Handshake Failure: Configuration Check Guide-Windows Defender Error 0x80073b01: How to Fix

Final checklist

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