I have an application that I've been working with for many years. It is very stable and I've not had any problems with it. It is an Access 2003 mde and to get it to run on Vista or Windows 7 I have had to maintain two development environments one with XP and the other with Vista. I compile for my XP users on the XP machine and for my Vista/Windows 7 users, I compile on the Vista machine.
Here is the strange bit of information. It works for me on my Vista machine and my Server 2008 machine but not for my clients. However, no users - I or anyone else - cannot get it to run now under Windows 7. This is a new behavior and not understandable since I never had a problem about this until about 2 or 3 weeks ago.