Welp, that's the gist of it, really. I had three hard drives in my old computer, one being my 250 gb SATA gaming drive which had the game installed on it. I got the parts to build my new computer finally, so I've built it and am using it as I type this. However, there's been no luck in getting the game to work on this computer because "The product appears to be validated but the serial number or the machine SID don't match."
Is there a way to re-activate it on the new machine without uninstalling the game? Thanks for any help.