I have a fairly new machine that I would like to upgrade to W7. Not that I don't like vista because I do ( it is just easier for the wife to have all machines the same os). It is a Dell Studio and I would like to upgrade to W7 Pro because of the XP option because I have an important program that needs XP. I have never had upgraded a Dell to my own OS. Will their equipment and drivers still work? I have heard that sometimes it doesn't or is that just bull?