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Fix ERR_SSL_PROTOCOL_ERROR on Windows 10 - How to Turn On Windows Defender After Group Policy Block-Windows Update 502 Bad Gateway: Step-by-Step Fix

2026-06-13 13:39:35browser-issues
Fix ERR_SSL_PROTOCOL_ERROR on Windows 10 - How to Turn On Windows Defender After Group Policy Block-Windows Update 502 Bad Gateway: Step-by-Step 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.