I have a PC at home which I upgrading the hardware. When I originally bought the PC it had Windows Vista Home edition, which I upgraded to the Ultimate addition.
After I install the new hardware (including a new empty hard drive) I'd like to install Windows 7 Ultimate. Can I do a clean install of Windows 7 if I have my installation disk and products keys of home and Ultimate Vista OS? Or do I have to install vista home, then upgrade to ultimate, then upgrade to 7?