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Fixing Cloudflare 521 Error: Enable Origin Pull Setup - Windows 11 Installation Assistant Stuck During Update-Windows 11 Installation Assistant Not Responding – 99% Hang Fix

Updated 2026-07-28 11:02:58developer-tools
Fixing Cloudflare 521 Error: Enable Origin Pull Setup - Windows 11 Installation Assistant Stuck During Update-Windows 11 Installation Assistant Not Responding – 99% Hang Fix
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.

More repair notes

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