Chipping in to mention that my installs usually also have this issue in Windows 10. Unfortunately, the game’s compatibility is aging poorly. The FAQ linked by Chessking is probably the best resource for solving the issue.
Welcome to the (very small) community! Glad to see new faces now and then and know people are still buying and playing the game 😀
I-War 2 Discord: https://discord.gg/RWaabWB
Very little about the game is not known to me. Any questions you got, throw them at me. 🙂