Free internet security software from your internet provider
As far as I know, most of internet providers offer internet security suite for free. These normally include firewall, anti-virus protection and privacy services. It could cost you a hundred dollars a year!
For users of comcast high speed internet, you can download the McAfee sucurity suite at comcast.net security.
If you use verizon DSL, on your browser of MSN premium with Verizon, click on safety tool bar and select virus guard, it will direct you to the series number of your McAfee account and direct you to the free download of McAfee security suite.