iirc there isnt much difference between the 2 apart from being able to network(what ever that means)with xp pro,plus a few more things no doubt,but really wouldnt cocern you or your daughter. when you had major probs with your computer how did you manage to get it sorted out without your windows disk? does the laptop go on line?coz if not i see no reason why you cant load your version onto hers, if you have the friday ad up at your neck of the woods look under computers theres usually someone selling the disks fairly cheaply.