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Windows Security App Won't Open in Safe Mode: Fixes - Chrome Certificate Authority Invalid Error Antivirus Fix-Troubleshoot Windows Defender Real-Time Protection Stuck Off

Updated 2026-07-28 10:06:11office-tools
Windows Security App Won't Open in Safe Mode: Fixes - Chrome Certificate Authority Invalid Error Antivirus Fix-Troubleshoot Windows Defender Real-Time Protection Stuck Off
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.