Time Machine to Uninstall Software

Hey Guys,

Here at work, apparently it is mandatory to install VirusScan onto all computers before becoming part of the network. I begrudgingly allowed the IT guy to install it onto my Mac, and after several rounds of AppDelete, looking in my system folder, etc., parts of the program are still running somehow. Long story short, I wanna use my previous Time Machine backup to revert my system to the way it was before this crap was put onto my machine. How does that work? Can it be done without wiping my whole internal drive? I've never really used time machine to revert back (only to grab old deleted files), so any help is much appreciated.

Thanks!

-Jv