This Kingdel mini computer worked as needed right out of the box. We normally use the Kingdel product for headless client projects such as small office VoIP servers and router/firewall applications. The BIOS is easy to access from boot up so we can set booting and power options as needed. We normally replace the Windows OS with a Linux based OS for the application needed. We have many of these Kingdel fanless mini computers in service and they are all running without problems.