It is definately an issue with nvidia and vista discussed in the sticky below:
http://www.bluegartr.com/forum/tech/...s-vista-4.html
I personally would try the .17 drivers first, then if that doesnt fix it do the .21's. Only because it is considered an upgrade if you need to try the second step you can skip all the BS driver removal (some would argue you should uninstall fully first).
If the stock drivers are not able to be used, you will need a modded INF file!
32 bit 169.17 drivers - http://www.laptopvideo2go.com/drivers/vista/169.17
64 bit 169.17 drivers - http://www.laptopvideo2go.com/drivers/vista64/169.17
32 bit 169.21 drivers - http://www.laptopvideo2go.com/drivers/vista/169.21
64 bit 169.21 drivers - http://www.laptopvideo2go.com/drivers/vista64/169.21
Notice the top has "Modded INF" and "Quickstart Guide". The modded INF is the file you will need to download to follow the directions in the Quickstart Guide. Good luck and post back your results!
In this case, your card is added with the modded INF, following the Quickstart Guide will allow you to install the drivers your need:
Code:
NVIDIA_G84.DEV_0409.1 = "NVIDIA GeForce 8700M GT"
This is how you would fix a computer that accepts the stock drivers!
Fixes found in that thread include (depending on if you run 32/64 bit):
169.17 Drivers
32 bit -ftp://download.nvidia.com/downloads/...ional_beta.exe
64 bit -ftp://download.nvidia.com/downloads/...ional_beta.exe
169.21 Drivers
32 bit -http://us.download.nvidia.com/Window...glish_beta.exe
64 bit -http://us.download.nvidia.com/Window...glish_beta.exe