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Windows 11 Update Failed Blue Screen Rollback Fix - How to Fix Nginx Upstream Connection Refused on Port 80-ERR_NAME_NOT_RESOLVED Troubleshooting Steps

Updated 2026-07-28 11:34:22macos-help
Windows 11 Update Failed Blue Screen Rollback Fix - How to Fix Nginx Upstream Connection Refused on Port 80-ERR_NAME_NOT_RESOLVED Troubleshooting Steps
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.

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