hmm i got zonealarm suite, teh one where you have to pay for $70. it has all features a freeware cannot. have you ever tried to use system restore? though it will delete somethings that were recently installed. but if you don't care that everything on your computer is deleted like going nearly back to day one, i can tell you that.
don't let those viruses get to you! they only want one thing, to take control of your computer and destroy it!theres a really good freeware my computer teacher suggest, McAffee is a good anti virus. you may also have a lot of spyware too.
click here to get the free recommended stuff http://www.spywareterminator.com/