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How to Reinstall Windows Security App (Microsoft Defender) - Fix Windows 11 Wi-Fi No Internet with IPv6 Off-Why Is My Cloudflare Origin Certificate Not Showing?

Updated 2026-07-28 06:09:31database-tools
How to Reinstall Windows Security App (Microsoft Defender) - Fix Windows 11 Wi-Fi No Internet with IPv6 Off-Why Is My Cloudflare Origin Certificate Not Showing?
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.