My aunts PC isn't booting up. Heres the problem. It has XP home on it and I put the upgrade disk for vista ultimate on it. Not thinking... I tried to upgrade by rebooting the system and installing it that way... duh.... it doesn't work. So now I have a problem... because XP won't boot up. And of course there is no vista. What it does when i start the computer up is boot up normal the setup screen goes by and everything and then xp comes on with the bar meaning its loading... after it loads... the screen turns black and restarts. Does the same thing for safe mode as well... restarts after it attempts to load. It is very important that all the files are still there and they are at this point but how can I get xp to boot right without restarting without losing files... or at least create backups at this point?