Technical problem

[Weasel]

Try CCleaner, it is free, just make sure you allow it to back up the registry before deleting. When you are done the game give it a minute to just sit, I remember long ago (LONG) that although it seemed the game was done it was still writing in the background, maybe that is the problem especially with XP. So finish your turn, wait a minute when back to the main menu, and then exit SP.