My Sony Vaio isn't friendly with NVidia drivers...

Hello folks,

I own a Sony Vaio with a GeForce 8400M. If I try to install the new 177.35 drivers, the installer says: "The NVidia Setup could not locate any drivers that are compatible with your current hardware".

This thing has always happened with “regular” NVidia drivers (those that can be downloaded from NVidia Homepage -> Drivers -> Search Drivers) BUT it hasn’t happened with “CUDA” drivers (those that can be downloaded from CUDA homepage).

What’s wrong with my computer?