New Intel Iris Drivers

Has anyone been able to install the latest Iris driver for the 4600. Drivers are:
Version: 15.36.19.64.4170 (Latest)
Date: 04/10/2015
Size: 119.01 MB
Language: Multi language
Operating Systems: Windows 7 (64-bit)*, Windows 8, 64-bit*, Windows 8.1, 64-bit*


For me the drivers say they are installed but when ever you look under device manager I still have the version dated 3/16/2015
Version: 10.18.14.4170.

Any help would be appreciated.

Cheers