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Fix Windows Defender Real-Time Protection Authentication Failed - How to Fix Windows Update 502 Bad Gateway Proxy Error-How to Clear Windows Terminal Cache Without Permission Errors

2026-06-13 17:43:45macos-help
Fix Windows Defender Real-Time Protection Authentication Failed - How to Fix Windows Update 502 Bad Gateway Proxy Error-How to Clear Windows Terminal Cache Without Permission Errors

Final checklist

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