I have to mention first that I currently have AVG Anti-Virus running on my computer. After running it for a couple of months, I must say that it certainly does do its job in preventing all kinds of viruses (except for the cold I caught this morning). The best part is that there is a free version with full functionality and effectiveness and it comes with free updates! Just go install it today and scan your PC for current viral infections that should have been taken care of weeks ago.

Link: Download.com