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Fix Windows Defender Sync Error 504 Gateway Timeout - How to Fix Windows Defender Real-Time Protection Turned Off-Troubleshooting Windows Search Service Not Running

Updated 2026-06-16 11:44:28developer-tools
Fix Windows Defender Sync Error 504 Gateway Timeout - How to Fix Windows Defender Real-Time Protection Turned Off-Troubleshooting Windows Search Service Not Running
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.