It is possible and legal to perform a clean install of a Windows 7 64bit Upgrade license from Vista 32bit? [duplicate]

"How does the upgrade process actually work? I definately want to
perform a clean install instead of a
in-place upgrade. Is this possible?

It's possible, it's actually mandatory for you. You cannot upgrade from 32-bit to 64-bit, a full install is required.

I currently have a valid Vista Home
Premium 32 bit license and want to
upgrade to Windows 7 Home 64 bit.
Judging from the answer to this
question, it is not possible to
actually upgrade it, but it seems it
is possible to perform a clean
install. How does this work? How does
it validate the fact that I actually
have a genuine Vista license prior to
installing Windows 7?

There is no software method of validation, you have to show proof of purchase for Vista to even receive your upgrade. The Vista copy also has to be retail, not OEM."

"An upgrade medium is identical to a regular one, so installing Windows 7 from it will not be a problem. There is no way to do an in-place upgrade from a 32bit OS to a 64 bit OS.

I'm not exactly sure what the EULA states, but I believe there will be no problems when upgrading from a 32 bit OS to a 64 bit OS from a legal stand point. Upgrading from a flavor of Windows Vista to the equivalent Windows 7 version does not depend on the type of OS architecture."