And it was working before with older drivers? That seems very odd to me. 2 versions might not be enough. That card is quite old, and embedded, so I'm quite surprised it worked at all. Which version of Maya are you running? If it's 2011/2012, are you sure you're not using Viewport 2.0? Go into the option box of the high quality viewport, and play with the settings there.

In the Nvidia control panel, everything should be set to "Application preference"