zhizhu
Home / browser-issues / Fix Windows Update Proxy Error via Group Policy - Fixing ERR_SSL_PROTOCOL_ERROR Certificate Issues-Windows Update Cannot Connect: Step-by-Step Checklist

Fix Windows Update Proxy Error via Group Policy - Fixing ERR_SSL_PROTOCOL_ERROR Certificate Issues-Windows Update Cannot Connect: Step-by-Step Checklist

2026-06-13 17:02:25browser-issues
Fix Windows Update Proxy Error via Group Policy - Fixing ERR_SSL_PROTOCOL_ERROR Certificate Issues-Windows Update Cannot Connect: Step-by-Step Checklist

Final checklist

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