I was the manager and lead tech at a computer business for 6 years, and Norton has worked well for me. If you have Comcast internet service you can get Norton Internet Security for free(legitimate, legal copy provided by Comcast), which is anti-virus and firewall software combined(and a few other goodies), just go to comcast.net and click the 'security' tab in the upper right hand corner and go from there. It's all quite easy to do. If you do not have Comcast and are pressed for cash AVG free is a descent way to go, but if you have the coin spring for the Norton, it's usually only $29-$39 for the software with 1 year of updates and well worth it. Good luck all and stay safe out there in cyberspace!