HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

I tested it on a 32-bit Windows 7. It works perfectly, even without any compatibility modes (although it works with them too). Maybe it works differently on 64-bit systems. But I still can't figure out what the problem is. Especially with such an uncommon report. Thank goodness, I won't have to ask users for details about the crash with HD 3.0. I'll just copy and paste this: "Send me the crash log." *** And I also need to create an installer for HD, because some people are having problems with the installation.