I used to play Medieval total war frequently, but stopped for a while. Today, then, I tried to start a new campaign. The game worked perfectly up until the point at which it was loading, then the screen turned black and it crashed to the desktop. This has happened several times, and since I've long since thrown the game box away, I can't register for online technical support. Has anybody here had this problem, and if so, do you have any suggestions on how to fix it?

Thanks in advance!