Fix Windows Defender Real-Time Protection Not Starting - Nginx Permission Denied Error on CentOS: How to Fix-Troubleshooting Cloudflare 522: Connection Timeout

Updated 2026-07-28 14:48:39office-tools
Fix Windows Defender Real-Time Protection Not Starting - Nginx Permission Denied Error on CentOS: How to Fix-Troubleshooting Cloudflare 522: Connection Timeout
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.