I got Windows XP Pro Upgrade from my college for $5, but I have Windows Home. I bought it because it is a steal and I will never see that price again, but what issues does it have versus using a true Pro CD? There has to be something otherwise it would have the whole version on it and you would be able to install it on any computer I would think. I have heard to never upgrade to XP from 98 or ME, but I was just wanting input on if it would be good to upgrade or best left as is with a full version of Home. Thanks in advance.