必应池
Home / developer-tools / Fix Windows Defender Real-Time Protection Not Starting - How to Fix Chrome Sync Not Working with Multiple Profiles-Fix Nginx 502 Bad Gateway: Upstream Connection Refused

Fix Windows Defender Real-Time Protection Not Starting - How to Fix Chrome Sync Not Working with Multiple Profiles-Fix Nginx 502 Bad Gateway: Upstream Connection Refused

Updated 2026-07-28 12:56:56developer-tools
Fix Windows Defender Real-Time Protection Not Starting - How to Fix Chrome Sync Not Working with Multiple Profiles-Fix Nginx 502 Bad Gateway: Upstream Connection Refused
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.