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Fix Nginx 502 Bad Gateway: Upstream Connection Refused - How to Resolve Windows Update Error 0x800f081f-Fix VS Code IntelliSense Not Working in WSL

Updated 2026-07-28 05:41:59windows-fixes
Fix Nginx 502 Bad Gateway: Upstream Connection Refused - How to Resolve Windows Update Error 0x800f081f-Fix VS Code IntelliSense Not Working in WSL
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.