This policy setting allows you to configure whether or not to display notifications to clients when they need to perform the following actions: Run a full scan Download the latest virus and spyware definitions Download Standalone System Sweeper If you enable or do not configure this setting, notifications will be displayed to clients when they need to perform the specified actions. If you disable this setting, notifications will not be displayed to clients when they need to perform the specified actions. Counter Measure: Configure this setting depending on your organization's requirements. Potential Impact: Notifications will be displayed and users may need to perform additional actions. Fix: (1) GPO: Computer Configuration\Administrative Templates\Windows Components\Windows Defender\Client Interface\Display notifications to clients when they need to perform actions (2) REG: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows Defender\UX Configuration!Notification_Suppress