I have the same issue...
I'm on a Vaio VGN-SZ280P with an Nvidia Go 7400:
I partitioned by hard drive to be able to dual boot windows XP and windows 7, but when I boot up windows 7, it doesn't recognize my graphics card. In my device manager for display adapters it lists "standard VGA graphics adaptor" ... so instead of being able to run my native resolution of 1280x800, i'm stuck at 1024x768.
I've read for hours about how to fix this, and most people have just said "install the windows vista driver for your graphics card and you'll be good to go." Well, i've downloaded the vista driver, but when I try to install it, it says that it can't find any hardware to install to
I've also tried booting up the manual hardware addition tool (hdwwiz.exe), but when I boot that up it only finds my intel chipset, doesn't list my Nvidia card.
I have a feeling that this might have something to do with the fact that my laptop has a switch to go between "stamina" and "speed" modes, where the stamina mode runs off of a different chipset. When I do the manual hardware add, it lists several intel chipsets which I recall appearing when I was on stamina mode in XP (however i'm in speed mode currently, so the Nvidia card should show up). Does anybody have any ideas? This is getting pretty frustrating, and I appreciate any input at all!
Btw this is the driver I'm trying to install: http://www.nvidia.com/object/geforce...9.48_beta.html