So i got a used computer from a friend of mine and not sure of the background on the desktop other than owned previously by a law office. It had windows xp pro on it. Well it was constantly having issues here and there and a friend of mine thought he figured out how to officially fix it. He proceeded to install xp home edition on the computer and Im not sure if he installed it over the xp pro or seperately. But I cannot access any of my old files, music, anything. On the start up screen it has choice of home or pro but clicking on pro and it wont let me in at all. Furthermore the home edition is defineately not installed right either. How can i get back into my home edition. Oh and I am not a computer tech kind of person either. Simple terms please. Please help.