1. Check 'Disable Sounds in Menus' option in sound submenu. 2. Make sure there's no sound in Menu. 3. Press Alt+F1, then press 'Exit to Menu'. 4. Press 'Start' 5. Notice that the lucasarts video has no sound. 6. Select any other mission and press 'Begin Mission'. 7. The mission will not load, the screen is black. 8. If you press Alt+F1, the game crashes.