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Fix Cloudflare Error 521 on Apache Server - Fix Windows Update Error 0x8024401c Due to Proxy Permission Denied-Setting Up SSL Certificates for Windows Update

2026-06-13 14:48:43cloud-software
Fix Cloudflare Error 521 on Apache Server - Fix Windows Update Error 0x8024401c Due to Proxy Permission Denied-Setting Up SSL Certificates for Windows Update

Final checklist

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