BleepingComputer.com: Disable access to EVERYTHING except one program

I have what I am sure is a very simple question, but I can't find anything in search. (Perhaps I am not wording it right) I am trying to set up a POS system on a computer, and I want absolutely EVERYTHING to be disabled on that account except the POS program. I would imagine there has to be a piece of software that can do it. Oh yes, and I would rather a piece of freeware, if possible... Unless there is another way?

This post has been edited by Shadow Wizard: 01 November 2009 - 07:08 PM