http://free.grisoft.com/
Sorry CWHALEY, but you are wrong
Free versions often are as good as the paid version, just good marketing strategy, give the free version to the private user and charge the professional for the "full" version.
They are correct in their marketing strategy, at least 1000 people have bought AVG on my recommendation, and those for home use continue to install the free version.
This is a better antivirus than the market leaders, on test I have found AVG to find viruses quicker than both Norton and MCAFEE and it doesent kill the computer performance like they do.
No question. The free version is excelent, just short of a few dinky if unimportant extras that come with the paid version.
The paid version is for professional use, and the free for personal use.
Make your choice.
(no affiliation wih AVG, just a smart choice for me)