This movie shows a guy plugging his XP machine into the Internet and the 60 seconds or so it takes for it to become infected and start propagating.
I suspect that it's a plain XP build, no security updates etc. In fact I'd put money on the fact that it's not XP SP2 etc.
But for sheer entertainment value (as opposed to technical accuracy) it is good.
http://www.cbc.ca/news/background/co...edcomputer.mov