You can use Vista upgrade for a machine with XP installed on it. You must use Vista full for a new machine. That's for sure.
Windows XP Upgrade was less demanding. It only required you to put a Windows 98 CD in the drive as proof that you had a valid license of Windows 98 to upgrade, even when installing on a new blank hard disk.
I don't know if Vista upgrade is just as easy about its requirements as XP or requires a operational (or even activated) copy of XP on the same hard disk or in the same partition.
But I'm sure somebody here knows.
I want to know whats the difference between Windows vista and windows vista upgrade?
i looked at vista boxes, and i saw 2 different windows vista ultimate. I saw Windows vista Ultimate cost around 500$ and Windows vista Upgrade cost 200$. What the hell is the difference?
Thanks in advance.