Ok, simple question. I purchased a new computer back in Febuary from Emachines that came with windows XP preinstalled. The system restore disc that came w/ the computer was a windows only disc, so in other words it didn't have all the drivers for my particular pc. So I contacted Emachines and explained what problems I had during a reinstall and they sent me a new disc, this one having been made specifically for my pc (windows plus drivers) So now I have two disc. The one made for this pc and a standard MS WIN XP HOME OS EM MEDIA R O5/05 disc as well... Now my question is: Can I use the disc not in use on another pc, or do they invalidate the old disc key or whatever when they send you another disc? My next question is will that disc only work on an Emachine computer? I would have given it a try before posting but I see no need to back up a bunch of stuff only to find out it didn't work. It's really not a life and death matter I don't guess but curiousity is getting the best of me... not to mention my daughter would rather have XP than 2000 just for the looks no doubt.