Unfortunately, it doesn't quite work as you would think. Instead, it tends to find a suitable driver of it's own choice, NOT necessarily the best. If you'd like to keep the newest driver, simply install it and move on.
Hope this helps.
My monitor flickers on and off 3-4 times at the end of the boot up cycle,and I thought this may be "driver" related.Installing the updated driver 126.96.36.19921 from Mftr. site went smoothly,but when I did a "driver update check" in "device mgr." it reinstalled my original driver 188.8.131.5230 dated 6/19/08 My OS Vista home premium 32-bit.Is this a case of ..vista knows best.?