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Fix Windows Defender Real-Time Protection Not Running - Troubleshooting Nginx 502 Upstream Connection Refused-Fix Chrome Sync Not Working Due to Proxy Settings

Updated 2026-07-28 14:06:33macos-help
Fix Windows Defender Real-Time Protection Not Running - Troubleshooting Nginx 502 Upstream Connection Refused-Fix Chrome Sync Not Working Due to Proxy Settings
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.