system
16
There you go:
"But most of all, I use common sense and the knowledge I have build up in those years. "
Try to explain that to a normal corporate user. 
Still looking at the evidence in the links from the above postings, it’s strange that you where not hit. I know 1 in the 30 requests from the Falk servers was injected with the malicious code in those hours.
Since you are running IE 6 SP1 (so you didn’t install XP SP2) you would be vulnerable to this Iframe exploit. See
http://www.securityfocus.com/bid/11515
So maybe there was a lucky angel (your request at that time was not number 1/30), our did you disable Active Scripting?
http://www.lurhq.com/iframeads.html
Our your client firewall blocked the traffic to the 2 chinese servers as described in the last posting off Matt.
http://www.finlandforum.org/bb/viewtopic.php?t=7685
But oke we will never find out, so let’s just wait and see how Alwil’s lab will solve this nasty bit of code. Lets hope for a quick response and use our common sense. 