Small business? Need antivirus? Microsoft Security Essentials!
As announced today ( https://blogs.msdn.com/b/mssmallbiz/archive/2010/09/22/announcing-microsoft-security-essentials-available-free-to-small-businesses-in-october.aspx ) MS Security Essential can now be used for free by businesses with up to 10 PCs.
I know quite a few people who will be very happy about that.