Incidentally , if the applications are well written, Microsoft sends them a clean close signal afaik, so they will save and exit. This will cause problems though, if for example you were tinkering with a file, and removed a method, but didn't intend to save, and then got dragged out of the office for 5 minutes, *just* as the 5 minute time out started, then you'd be fucked.

But if you're the sort of person that those things happen too, you're better off not going near a computer.