This is a link to the intel site, with your video card set on the page. Just choose your operating system
http://downloadfinder.intel.com/scripts-df/Product_Filter.asp?ProductID=865
Then just choose the latest driver by driver version.
You should then be set and it should jsut update using the exe file, though if you get a zip file. un-compress it, and then go to where you found out the driver version, go to update driver, and browse to where you uncompressed the file, and it should see it as a newer version and update it for you.
Try and get an EXE version though that'll automatically install for you.
Hope this helps