I have one machine with two users configured, one is an admin user with full admin rights to the machine, the other user is a basic user belonging to the 'users' group. The problem I have is that if I run my install set when logged in as admin it installs and runs perfectly. But if I install the application as admin and then without running the app log in as user1 and attempt to start the app I get a message box saying "unexpected error" even before the splash screen is displayed. The bizarre thing is if I run the app first when logged in as admin and then run it when logged in as user1 it works fine for both users. I have taken a snapshot of the registry before and after running the app as admin and don't see any obviously important changes being made in the registry. Does anyone have any ideas? Have I missed a setting somewhere?