This policy setting allows you to turn off all notification balloons. If you enable this policy setting, no notification balloons are shown to the user. If you disable or do not configure this policy setting, notification balloons are shown to the user. Fix: (1) GPO: User Configuration\Administrative Templates\Start Menu and Taskbar!Turn off all balloon notifications (2) REG: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer!TaskbarNoNotification