I have been using AVG Free, Malwarebytes and Super AntiSpyware for a while now. I torrent a lot of stuff and my other computer recently died. I took it into bestbuy (still had a warranty) and they ran the diagnostics where they found many viruses that my antiviruses apparently didn't pick up. They want to charge me $130 to clean the computer, and now I'm worried about what might happen to this computer. Is it worth paying for an anti virus? If so, which one? And with which program can I clean the viruses on my other computer and potentially this one?