Thanks for the reply,
I am using a full version of Access 2010 and it is in Trusted location. When I try to open a form with VBA Programming from the Navigation Pane I get a message that "Microsoft Access has stopped working" and then "Access is restarting". Next, the VBA editor opens showing only one page of programming although there are many pages. This application works perfectly on other computers, one with Windows 8 the other with Vista. All development was done on the Windows 7 computer I'm having trouble with. This is fairly large data base with dozens of forms, queries and tables. Is it possible there isn't enough memory? Or is there a setting that I inadvertently clicked on that prevents programming from working?
I hope you pros can offer a solution.