Hi guys, I'm a current user of windows vista home premium 64 bit. I'm really interested in installing the windows 7 professional version and want to take advantage of this upgrade disk deal going on right now. My question is is it allowed for me to purchase the windows 7 professional upgrade CD and do a clean install of windows 7 professional when I have vista home premium instead of vista business (I already own the vista home premium OEM CD) or am i only allowed to use the windows 7 home premium upgrade CD (meaning that the only way to install windows 7 professional is through buying the retail copy when it comes out). Thank you so much for your help guys.