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Fixing ERR_SSL_PROTOCOL_ERROR Certificate Issues - How to Fix Locked Activation File in Windows-Troubleshoot Windows Defender Real-Time Protection Turned Off

2026-06-13 16:56:34windows-fixes
Fixing ERR_SSL_PROTOCOL_ERROR Certificate Issues - How to Fix Locked Activation File in Windows-Troubleshoot Windows Defender Real-Time Protection Turned Off

Final checklist

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