De acordo com a documentação do cliente Windows Dynamic IP Updater, há um //www.opendns.com/support/dynamic_ip_windows/#hidden">Modo oculto :
Even if you close the program window, it shows its icon in the system tray area of Windows task bar. You can make the program even more hidden by choosing "Run hidden" menu item from contextual menu in system tray icon.
When running in hidden mode, you can see status window by launching the program from Start menu.
Você também pode querer considerar Como desativar as notificações de erros :
When an error happens, the program will notify you by showing status window with error message describing the problem. Sometimes this might happen often and be distracting. You can disable those notifications by clicking "Stop nagging me" link present after error message. You can re-enable notifications by clicking "Start nagging me" link.
Please note that by disabling notifications about problems you might miss a configuration problem.