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Fix Chrome ERR_TUNNEL_CONNECTION_FAILED Error - Troubleshoot Windows Terminal Proxy 407 Error-Reduce Windows Defender CPU Load

Updated 2026-06-13 17:24:18windows-fixes
Fix Chrome ERR_TUNNEL_CONNECTION_FAILED Error - Troubleshoot Windows Terminal Proxy 407 Error-Reduce Windows Defender CPU Load
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.