So I have a wife who will sit down at her ibook and type for four and a half hours straight without even taking a break to get up out of her chair. Needless to say she ends up with a major eye splitting headache all evening (and I don't like her tellin' me she has a headache!) Anyway, is there any kind of software program that will either pop up a huge reminder for her or better yet, disable her computer for x number of minutes to force her to take a break. ( I would want an override to the locking of the computer just in case she has a five minute deadline to work on something.) I searched online and only found things that time work for jobs, etc. Please help!!!