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How to Enable Windows Defender Real-Time Protection via Group Policy - Fixing Cloudflare 521 Error: Enable Origin Pull Setup-Windows 11 Update Not Downloading: 0% Stuck Fix

Updated 2026-07-28 12:43:38office-tools
How to Enable Windows Defender Real-Time Protection via Group Policy - Fixing Cloudflare 521 Error: Enable Origin Pull Setup-Windows 11 Update Not Downloading: 0% Stuck 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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