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Fix Windows Defender Proxy Error Sync Issue - Diagnose Network Issues in Windows Terminal-How to Fix 502 Bad Gateway Certificate Errors in PowerShell

2026-06-13 20:43:21windows-fixes
Fix Windows Defender Proxy Error Sync Issue - Diagnose Network Issues in Windows Terminal-How to Fix 502 Bad Gateway Certificate Errors in PowerShell

Final checklist

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