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Fix Windows Defender Real-Time Protection Not Running - Docker Container Exits Immediately with Code 0: Fixes-Troubleshooting Cloudflare 521 Error After DNS Change

Updated 2026-07-28 10:59:07developer-tools
Fix Windows Defender Real-Time Protection Not Running - Docker Container Exits Immediately with Code 0: Fixes-Troubleshooting Cloudflare 521 Error After DNS Change
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.