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Fix Java JDK Not Recognized in VS Code - How to Repair Windows Security App on Windows 11-Resolve Windows Defender Sync Error 504 Gateway Timeout

Updated 2026-06-14 14:45:02developer-tools
Fix Java JDK Not Recognized in VS Code - How to Repair Windows Security App on Windows 11-Resolve Windows Defender Sync Error 504 Gateway Timeout
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.