Follow the directions below, some details may vary depending on your OS:
-Control panel
-System
-Device manager(tab at the top)
-Display adapters-should have a small drop-down(highlight this)
-Select "properties" at the bottom.
You should be able to findout the type of video card, once you do that and select properties, then "driver details" in another tab you can choose. This should tell you the date the current driver was produced.
With the video card brand then go to
http://www.driverzone.com/ and you can see if any updates have been made to the drivers or not. If so, d/l them and place them in the windows/system/drivers folder then use the "update driver" button on the driver details tab.