The screen goes dark. A system error message appears.

I bought the fifth installment of Heroes of Might and Magic, a licensed DVD. I installed it, watched the intro videos, and everything seems fine in the menu, but as soon as I start loading a mission or campaign, that's when the problem begins. The loading process itself goes smoothly, but when the loading bar reaches 100%, the screen goes dark for about five seconds, nothing happens, and then a system dialog box pops up saying that an error has been detected in the executable file and asks if I want to send a report. I click "don't send," and the game simply closes. What should I do?