Are Vista product keys 32 bit specific?

[Koolpc]

Well, as long as the OS is activated, by Microsoft i for one won't loose any sleep over it.

[Blaineoliver]

I need to reinstall windows on a new partition with 64 bit, im using 4GB of ram, with basicaly half a gig wasted. I also will see benefit in some games. It gets messy though on the hard drive.