you would have to give more details on your error message. such as "invalid page fault in module...." If it's a problem with another program, you could try closing out of everything else running on your computer before you run your game. Press Ctrl, Alt, Delete (at the same time) and click on End Task for each item except Explorer and Systray. Also download and install the patch for the game from www.lucasarts.com
and make sure that you follow the instructions given there for using the patch successfully.