There are 2 versions of windows XP. It's Windows XP Home Edition and Windows XP Proffesional Edition. Now, the home edition is a bit bit lighter than prof. edition. If you want your kid to play, install home edition, if you want to do your job on the pc, then install prof. edition.
OK, so when I had XP Pro installed before it ran real slow, painful, would XP Home (if I installed Home) run better or much the same as Pro?