all I can think of is to Control Panel>Sound and Audio Devices and tell us what you see...
Please tell us what make and models of graphics cards, sound cards, and game controllers you have. I'm thinking the graphics card has an integrated sound module, and when you deleted the video settings you messed up the sound driver.
On a second note, where are you getting the video/game controller dialog? Control Panel only has separate sound and game controller options, and I wasn't thinking clearly when I posted sound, "video, and game controllers."[/size]