I fear the answer to this will not be as simple as I want it to be. I think I'm returning to the world of Microsoft for a while to try out windows 7, and would like to use an antivirus program. It'll be behind a hardware firewall but used fairly often by people who are proving difficult to educate against clicking the pretty banners. Don't really mind about system resources used, the slowest system it would be on is an e8400 with 4gb of ram.
I remember Kaspersky being highly regarded so will go for that if no one has other suggestions.
Advice much appreciated.