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Home / / How to Fix Cloudflare SSL Full Strict Self-Signed Certificate Error - How to Fix SFC Scan Hang During Windows 11 Upgrade-How to Resolve Nginx Upstream Connection Refused Error 502

How to Fix Cloudflare SSL Full Strict Self-Signed Certificate Error - How to Fix SFC Scan Hang During Windows 11 Upgrade-How to Resolve Nginx Upstream Connection Refused Error 502

2026-07-28 07:04:55
How to Fix Cloudflare SSL Full Strict Self-Signed Certificate Error - How to Fix SFC Scan Hang During Windows 11 Upgrade-How to Resolve Nginx Upstream Connection Refused Error 502

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.

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