Win 7 Options?

[schnipps]

For the upgrade of windows 7 do you need to have vista installed or can you just use the key on the vista box? I have the oem vista home premium and i want to go to win 7 home premium

 

[schnipps]

Dam thats a total faff on as its for a new HD, is the upgrade option any more clunky than a normal install of 7?

 

[schnipps]

Nah, especially if it's a vanilla install. This might be useful to you:

http://www.winsupersite.com/win7/clean_install_upgrade_media.asp

Thanks, another question. Can you change between versions of win 7 by using a different product key? So if you bought home premium and decided later you wanted ultimate, is it just a change of key to 'upgrade' or do you have to do a full re-install over the top?