I have a customer who is running an application that runs fine at many other sites. This site has one exception. When the application is being used on a computer, the system works perfectly fine. If they leave there system for ~15 minutes, the system crashes when the click on any buttons, menus, screens in the application. This is happening on 3 of their systems. They have

WIN95
NOVEL 4.1
USING MICROSOFT CLIENT.
NO SCREEN SAVER

Any help would be appreciated.