You need to read: http://www.sarc.com/avcenter/venc/data/w32.bropia.m.html

If you get an IM message (even from someone you know) that reads something like this: LOOK! http://members.chello.nl/g.geurts1/handcuffs.XYZ. . . .  Don’t click on it.  If you do, you’ll need to clean it before rebooting because it adds an executable to your run-once list. 

If you are skeptical of everything and don’t click, you are safe.  I know a LOT of people who have been affected by this.