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Windows Defender Real-Time Protection Troubleshooting Checklist - Fix Cloudflare Error 521 After a Server Update-Git SSL Certificate Problem: Unable to Get Local Issuer Fix

2026-07-28 13:03:13browser-issues
Windows Defender Real-Time Protection Troubleshooting Checklist - Fix Cloudflare Error 521 After a Server Update-Git SSL Certificate Problem: Unable to Get Local Issuer Fix

Final checklist

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

More checklist guides

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