Oops, thought you alraedy installed the nvidia driver ... ömmm, do you actually have a nvidia graphics Card in your Laptop?

Ok, if you have an nvidia Graphics Card, you may download the Drivers from here. Unix Drivers Portal Page

Otherwise you can look for the "Restricted Hardware" entry in your system Menu, here you can activate your graphics card - the drivers will be automaticly downoadet and installed.

Good luck.

Regards of the Sponge