Windows Defender Real-Time Protection Greyed Out: How to Fix - How to Fix Cloudflare 526 and 525 Errors on Origin-DNS Probe Finished NXDOMAIN: Quick Fixes

Updated 2026-07-29 03:49:53macos-help
Windows Defender Real-Time Protection Greyed Out: How to Fix - How to Fix Cloudflare 526 and 525 Errors on Origin-DNS Probe Finished NXDOMAIN: Quick Fixes
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.