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Fix Windows Defender Real-Time Protection Not Starting - Troubleshooting Cloudflare Error 522: Step-by-Step-How to Fix DNS Probe Finished NXDOMAIN on Windows 10

2026-07-28 07:45:18
Fix Windows Defender Real-Time Protection Not Starting - Troubleshooting Cloudflare Error 522: Step-by-Step-How to Fix DNS Probe Finished NXDOMAIN on Windows 10

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.

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