Is there a program that will remove a program that won't uninstall normally?

I downloaded an antivirus program that isn't working, and when I went to add/remove programs and clicked on it I got a message saying it may have been removed already and wouldn't allow me to uninstall. I looked in 'search' and it showed it was still all on my computer. It is 67MB, doesn't work(won't initialize and open), and won't let me uninstall it, or delete it from 'search', ect. Is there a program that can remove applications such as this that have some glitch that won't allow them to be uninstalled normally?
Sheena