Presenting system and device conditions and purchasing options for components compatible with hardware devices of a computer system. In one aspect, an operating system determines the identity of a hardware device in communication with the operating system, communicates over a network to receive current purchasing information related to the hardware device, and displays components that can be selected for purchase and used with the hardware device. Another aspect provides a selectable user interface control for display in a graphical user interface that indicates a new operating condition of the computer system, different from a prior operating condition, by displaying a different appearance of the control. One embodiment has a new operating condition occurring when a component of a hardware device is within a predetermined threshold of requiring replacement, refilling, or supplementation.