How do you change your video driver on a notebook?

I need to change my video driver, but nothing i've read about it will work with my computer.
I have a Acer notebook with windows 7 installed, and my current video driver is Intel GMA 3150, and i need to change it to GeForce 6 by Nvidia.
If anyone could help me I'd reallyappreciatet it.

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).