Try this, if it does not help, you will need to disable always running Defender services. Or just disable the icon from startup (SecurityHealthSystray.exe)? Code: rem 1 - Antivirus Disabled Notification reg add "HKLM\Software\Microsoft\Windows Defender Security Center\Notifications" /v "DisableNotifications" /t REG_DWORD /d "1" /f reg add "HKLM\Software\Policies\Microsoft\Windows Defender Security Center\Notifications" /v "DisableEnhancedNotifications " /t REG_DWORD /d "1" /f rem 0 - Security and Maitenance Notification reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Notifications\Settings\Windows.SystemToast.SecurityAndMaintenance" /v "Enabled" /t REG_DWORD /d "0" /f