The computer guy who works on my computer tells me the best virus protection out there is the free protection offered by Microsoft. We've used Norton's (got a huge virus that locked up the entire computer), Kaspersky (got viruses that affected how it was used by changing my programs constantly), and AVG (lots and lots of problems). I'm about ready to listen to him and try what he says. It's for sure the ones we've paid big bucks for have not done the job. I'm very careful about what I open and download as well, but nothing is foolproof.