The only virus I've had the risk of getting was conficker. It said that most computers with Vista should be shut down for the remainder of April Fools Day. I didn't get it, but 5 people I know got it.
That would suck ass.God dammit, the stupid Windows Police Pro [/fraud] keeps regenerating.
One of the big reasons that viruses are made is for identity theft
http://www.bleepingcomputer.com/virus-removal/remove-windows-police-pro
AVG Free + Being smart + Scanning regularly + Auto Shotgun = my condom of the internet.