|It's a very old version of MOH, released well before Windows 7 was launched. Try running it in compatibility mode for Windows XP by right-clicking it's shortcut and choosing "Properties". Then click the "Compatibility" tab and configure it for XP.|
If that's still no good, well that version of MOH is just not compatible with Windows 7.
One important piece of information you've failed to include is whether or not the game has ever been running okay on that particular PC & operating system.