>I need an idea how to create a program that is limited to X number of users...say 5.
>
>However, if one of the user's PCs locks up, and he needs to reboot. I need the system to automatically release one of the "seats" so that person or another can log in.
>
Take a look at article 'KB003: Limiting Simultaneous Users' by Craig Berntson http://www.craigberntson.com/Articles/kb003.htm