Who said we were silly for thinking that. It has been common knowledge to me for years and most people I know too. However it is alarming how many attacks there are. I do doubt it is that bad but it doesnt help the lack of assistance makers put into their machines. I run a blog about this sort of topic and while I have readership I dont get that many. Maybe there should be more material out there or automatically given to all users in the UK who buy a new PC.
The problem really lies in people not knowing what they need to do. Most people buy XP home and do nothing else but fill the drive with useless rubbish. I know many who do this and no matter what you say they wont do it. We really need an AV, firewall and antispyware app that is free and runs all 3 weekly and automatically shuts the PC off after it sorts the problems out and runs when the user sets the system to turn off or does it at a time when they are not on the computer.