I'm with Mixture...
My view on Free apps.... if they are free:
1\ Who ever writes them cannot have the resources to respond to the dozens of new viruses which are released on a daily basis -its too big\complex a problem even for a genius....
2\ If its not a 'proper commercial company' with a lot of Kudos, how do you know something you dont want isnt being embedded onto your system.
3\ Of all the companies I have used, almost 100 hundred small to medium networks - Norton (2011) is currently my preferred choice, and a vast improvement on the CPU hogging 2008-2010 versions.
Prevention, whilst never 100% failsafe - is always better than cure
