Methods and devices for selectively presenting a user interface or “desktop” across two devices are provided. More particularly, a unified desktop is presented across a device and a computer system that comprise a unified system. The unified desktop acts as a single user interface that presents data and receives user interaction in a seamless environment that emulates a personal computing environment. To function within the personal computing environment, the unified desktop includes a process for docking and undocking the device with the computer system. The unified desktop presents desktops or windows based on a set of pre-determined rules.