Game crashes: questions and answers.

Hello! I have a problem with the game crashing in Windows when entering a town (both with and without a hero). Different towns cause this issue in different ways. The worst situation is with the Elves and Haven. But until now, the issue could be fixed by saving before entering a town or skipping one turn. But now, in the Hammers of Fate add-on, this trick doesn't work. I'm playing the first campaign, third mission. This bug started around the tenth time I entered a town – before that, everything was fine. If my computer couldn't handle the game, wouldn't this have started immediately? I have Vista Home, a dual-core processor, and an integrated graphics card. But if my computer couldn't handle the game, wouldn't this have started immediately? Please tell me how I can be helped. I have already reinstalled the game. Thank you in advance.