Vista - Having trouble uninstalling a game.

Trying to uninstall a client of world of warcraft. It put some files on my
computer and they dont work. I go to control panel and uninstal programes but
when i try to do so it gives me an error: "uninstall.xml" could not be read.
Can anyone help me figure out a way to uninstall this so when i actually do
go back home to get my Cd's it doesnt screw up with what i just downloaded.

Thanks