This policy setting turns off real-time protection prompts for known malware detection. Microsoft Defender Antivirus alerts you when malware or potentially unwanted software attempts to install itself or to run on your computer. If you enable this policy setting, Microsoft Defender Antivirus will not prompt users to take actions on malware detections. If you disable or do not configure this policy setting, Microsoft Defender Antivirus will prompt users to take actions on malware detections. Fix: (1) GPO: Computer Configuration\Administrative Templates\Windows Components\Microsoft Defender Antivirus\Real-time Protection\Turn off real-time protection (2) REG: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows Defender\Real-Time Protection!DisableRealtimeMonitoring