I installed GCII and registered it and even played a few games on it. But now after re-installing windows it says "The product appears to be registered but the serial number and the machine SID don't match". I don't want to re-install it because I was in the middle of a game and It takes too long to re-download via the internet. And the Activate application in the main folder dosen't start. And SD central says I haven't installed it.