Can a Windows 64-bit product key be used on a Windows 32-bit O/S ?

[hackerman1]

Hi !

Can a Windows Vista 64-bit key be used on a Vista 32-bit O/S ?

[HappyAndyK]

You can use the same Windows key for x86 or x64, provided they are retail versions. This may not hold true for OEM versions of the license.

Some more interesting info here.

[hackerman1]

Thanks Andy.
Well, i know it works on W7, but i was unsure about Vista.
The reason for asking is a 64-bit OEM-key that is not accepted on a 32-bit version of Vista.
But it might be because it´s OEM.
I know the difference between OEM & retail, i have refreshed my knowledge today....
Thanks anyway.
And after some investigation i have also found some information saying it should work,
but also info saying it doesn´t work on Vista if the key is from Vista SP1 and the software is RTM (no Service pack),
so i wanted to doublecheck.