McAfee AntiVirus Plus 2010 (1-User) for $10.99 shipped. Here is a screenshot for your reference. This program shields PCs from viruses, spyware, and has a firewall to protect against network attacks. It also features McAfee SiteAdvisor that warns about risky web sites before users visit them. Note that the 3-user license version is available here for $18.99 with free shipping on orders over $25.