I have rather old Sony laptop - VGN-FE890. It uses GeForce Go 7400 video card and for this card there is no driver neither in windows itself nor at NVidia site. I had this problem when I were using preview version of Windows 8 and it was easily solved by downloading driver for Vista/Windows7 version 179.48. But now it doesn't want to install.
There is the screencast where this problem get solved by exactly the same way and on release version on Windows 8 (http://www.youtube.com/watch?v=6JCfHAGS624). But it doesn't work for me.
UPD: When I run setup I'm getting the following error: The NVIDIA Setup program could not locate any drivers that are compatible with your current hardware. Setup will now exit.
I think this should be solvable. After all, it was working in preview versions.