After playing for half an hour or an hour, the screen starts to distort.

It's not exactly distortion, but rather the game divides into thousands of small squares... the entire game freezes, and even after pressing Ctrl-Alt-Delete, nothing happens. I have to restart the computer, which, as you can imagine, is very tiring. P.S. I have a powerful computer, DirectX 9.0 is installed, and the game is a licensed copy. I can't reinstall it because I lost the disc.