http://www.intel.com/p/en_US/support/highlights/graphics/g31/

If you give more details, I can reply in more detail. That page does have a link titled "Automatically detect and update drivers and software," which sounds like a good start. And / or read this: http://www.intel.com/support/graphics/sb/cs-010475.htm

Did your equipment come with a driver disc? You can start with that and then do Windows Update.