Hi there, I am again having problems trying to play this game and was wondering if anyone could help me. I recently upgraded my computer, and as a result had to re-install Galciv2. I can play the original non-updated game, however as soon as I update the game I get the following message when i try to launch the game: 'The product appears to be validated but the serial number or the machine SID don't match.' What is the machine SID and can anyone offer a solution? Many thanks.