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Windows Update DNS Error: Practical Troubleshooting Checklist - Fix Windows Update 502 Bad Gateway Error-Fix SSL Certificate Error in Windows Defender

2026-06-13 14:24:10developer-tools
Windows Update DNS Error: Practical Troubleshooting Checklist - Fix Windows Update 502 Bad Gateway Error-Fix SSL Certificate Error in Windows Defender

Final checklist

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