Last viruses I had were only a few weeks ago, but that was because a site company with a mailing list was being used to send out virusmails. Once they noticed that they shut down their computers and the virusflood stopped. Before that, it's been ages since I got a virus. The strange thing is: the last few viruses I got always came from/through a mailing list. Ofcourse, I know when I get a virus, so I []never[/b] execute them, I only save them to disk to see whether or not my AV-program can detect it.
When I ran Ad-Aware a while back it only found one Alexa-reference in my registry, and that probably only works in IE, which I only (have to) use for XP updates.