I have laptop
Sony vaio vgn-ar61mr
It has video card
nvidia 8400m gt
It has Windows 7 (originally Windows Vista was installed)
Few weeks ago video acceleration stopped to work. Its video is recognized as VGA. When I install NVidia driver downloaded from NVidia website then it tells there no compatible hardware.
All 3D apps stopped to work. I tried many things except Windows re-install. It would be hard to get all software installed back.
I was able to install driver from Sony UK website
There is Vista 32bit and it worked on Windows 7 32 bit as well.
It improved performance but I still willing to install original NVidia drivers. They do not install with same error.