The Vista Upgrade Advisor only runs on 32-bit version of XP and Vista and its recommendations are based on upgrading to a 32-bit edition of Vista. The logic behind it is that almost all of the drivers must be redesigned for 64-bit compatibility, meaning everyone would 'fail' the upgrade test. (All of your drivers are 32-bit since you're running a 32-bit OS.) Aside from driver compatibility, though, the results mostly hold true for both 32-bit and 64-bit editions, with the glaring exception being the requirement of a 64-bit processor.
Hope this helps,
John
The result you get when you run Windows Vista Upgrade Advisor is that for running 32 bit or 64 bit or both Thanks in advance
Richard

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