Hi Kevin, I recommend AVG Free (they have one you can purchase but the free one works incredibly well. Google "AVG Free/Download" and make sure it's Version 8 or higher - that's the latest one. Scroll down the page to find the real FREE one not the TRY FOR FREE
I've been using this virus protection system on my computer and all my clients for more than 2 years and it beats Norton, McAfee and all the rest hands down. Hope this helps - Bruce (shopbruce@gmail.com)
Bruce, June 2008
I FIND THAT AVAST HOME EDITION FREE VERSION IS BRILLIANT
nhoj namrog, January 2008
In my opinion AVG Free. http://free.grisoft.com/doc/1