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How to Fix Windows 11 Installation Assistant Stuck at 99% - Cloudflare SSL Full Strict Troubleshooting Steps-Fix Nginx Upstream Connection Refused on Port 80

Updated 2026-07-28 12:23:26macos-help
How to Fix Windows 11 Installation Assistant Stuck at 99% - Cloudflare SSL Full Strict Troubleshooting Steps-Fix Nginx Upstream Connection Refused on Port 80
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.