What do you guys use for an antivirus?

Running avg.

Sent from my Nexus 7 using Tapatalk 4

Norton has been pretty solid, but Security essentials seems more than sufficient if you don't do stupid crap on your PC. Also if you are in the UK, it's worth getting a Barclays account as you then get free Kaspersky subscription with internet banking; although I haven't personally tried Kaspersky other than in VMware to see how it works.