My MBA gets a 3.5 in Vista through boot camp, so it is very likely a virtualization issue.
If I was virtualizing Vista, I would certainly turn off Aero.
My 2.2 ghz SR 8600m gt 128 mb mbp also gets a rating of 1.0 in bootcamp 32-bit... but Areo still runs anyway, even after the test. I have tried different video drivers and nothings works...
Here is your problem...
Windows/ Microsoft.
Are you really that surprised?
This should fix it...
Go to, C:\windows\performance\winsat
delete winsat.txt
open the datascore folder and delete all .xml files that you find.
go to performance settings and rate your pc.
Let us know if that worked for you.
DK
Don't worry, cranky Vista is just trying to get you to buy a PC.