Are you having any problems? If not I would leave well enought alone. If yes, check the release notes to see if it sounds like it might help.
It is best to stick to the OEM version of the driver if possiable.
( it is very likly there is not much difference between teh drivers 126.96.36.1992 VS 188.8.131.525 . Your current driver appears to be a "Newer Build" (larger number) than the update. This could mean that they are the save version, just one is generic and one is OEM.