Error message/can't run program

Looking for support on the following error, which won't allow the program to run: "The product appears to be validated but the serial number or the machine SID don’t match." I performed a destructive system recovery on winXP a few months ago, so perhaps that something to do with it? I have tried reinstalling, didn't work. The game worked fine before the recovery.

It sounds like just a validation thing, but I don't know why it didn't fix when I reinstalled the game/rebooted.

Solutions? I sure would like to play again...