Another method to find driver, manual driver search.
actually every driver has their vendor id and device id. It is very simple method just look for the id at device manager. to go to device manager right click on my computer or computer icon then click properties and click the device manager tab. At device manager click on te unknown device icon check the icon properties or right click at the unknown device and click properties. then go to detail you will see some thing like this
PCI\VEN_8086&DEV_2A42&SUBSYS_30868086 <— Vga driver
