Security Feature

I am currently exploring boxes at a university. I've noticed that the IS department has set up some kind of security feature that resets every computer (OS) on campus, at approximately 4:00 A.M. every morning. I was wondering if anyone knows how this is done or knows of any white papers, links, etc.

Assumed:

T'is network based. Perhaps Novell.

Any help is greatly appreciated.

Probably just rolls them all back to a specified point. Look up DeepFreeze.

Thanks.

Yeah, most likely it's a program distributing harddrive images. Not sure if they'll use the windows rollback feature for this, though.