Sent to you by amabdelsalam via Google Reader:
List all the drivers you’ve installed on your Windows machine by typing driverquery from the command line (start->Run->cmd->OK). This works under Windows XP, 2003, and Vista systems; WindowsVistaPlace states that there is even more information to glean from this simple program: remote system direction, output, and information about signed drivers, among others. Loving the power of that little black box? Get to know your friendly neighborhood command line.