Why don't you just take advantage of locking the computer after 5 min of inactivity. Display Props - Screensaver - Power options - set system standby to 5 min under the power schemes tab - go to ...
I run a lab of a dozen Windows 2000 boxes. I want them to be able to automatically log off or "lock computer" after a certain period of idle time. If possible, I'd like to do this within Windows. (ie, ...