With my household budget currently very tight due to the costs of several back surgeries I've had recently I'm needing to find a free version of a good anti-virus program to use until things loosen up. What are the best ones out now? I've heard of Avast, but don't know how good it is, and really don't know of any others out there that would be dependable and work well. What's your opinion of what's available now? Thanks for the assistance!