I made an iso of game The Battle to middle Earth 2 for the reason that my cd got scathed and i purchased a new laptop. The game worked fine on my old laptop which OS was windows vista. When I use the iso on my new laptop it is working fine for 5 min and then all my buildings crash down and then the word DEFEATED displays on the screen. Please help my to fix this. I currently have Windows 7 Professional. could that be the problem?