We have mission-critical Windows 7 workstations on our network that must be available to any user at any time, even when it has been locked by a prior user. Thus, we have fast user switching enabled. Unfortunately, it's not unusual for us to have a dozen or more different users logged onto the same machine at the same time, with a corresponding degradation in service.

We've done our best at educating the masses to log off at the end of their shift. But users being users, this does not happen on a consistent basis. Does anyone know of a clean way to force logoff idle users after a certain amount of time has elapsed? I am open to any method that could be deployed/configured via script, GPO, or SCCM.