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Fix Chrome ERR_TUNNEL_CONNECTION_FAILED Error - Fix Windows Defender Service Not Starting Error-How to Make Windows Defender Trust a Self-Signed Certificate

Updated 2026-06-14 21:04:15developer-tools
Fix Chrome ERR_TUNNEL_CONNECTION_FAILED Error - Fix Windows Defender Service Not Starting Error-How to Make Windows Defender Trust a Self-Signed Certificate
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.