well.. if someone got your product key through illegal activities i wouldnt think it would be as simple as through your ip or whatnot. even though if someone has had your ip, they would have to get into your computer via port scanning, trojans etc. because if im not mistaken your product key is located in your registry. and to view that you would need to upload someones SAM (which is totally possible through a trojan) or have access to viewing it. reverse connection trojans is probally how someone had got it ( if that is what had happened) working at a computer center, i have from time to time seen keys that after the first format, wouldnt activate :-( but normally calling activation center will help. lol honestly its about talking to the right person, if you get them and explain your situation, if your lucky they will give you another key :-D . its happened to me just aggravating calling them over again to get to that right person :-/ Hope you have good luck with your situation!