
Quote: Originally Posted by
wpurcell
I think an upgrade version will work as long as you have a copy of a previous Win OS. This has worked in the past for me with XP.

Windows will upgrade to itself...this is where the double install of Windows 7 comes into effect so you can do a clean installation of Windows 7 without upgrading from a previous OS using the upgrade DVD.
This method worked with Vista & I see no reason why this wouldn't also work with Windows 7.
But if all else fails I CAN upgrade from Vista Ultimate if I have too to get the discounted price.
More info on this method at Windows Secrets.
Get Vista upgrade, never pay full price "Use Vista's 'upgrade' version to clean-install "
The secret is that the setup program in Vista's upgrade version will accept an installed copy of XP, W2K, or an unactivated copy of Vista itself as evidence of a previous installation.