Intel Hd Graphics driver

I am using Hp pavilion G6 3rd generation..... I have Win 7 Professional 64bit installed in my laptop... when i went to the intel site to update my Intel Hd 4000 graphics driver... I got this given below

Product Detected                                          Intel HD Graphics 4000 Current Driver Installed 10.18.10.3308

Newer Driver Available:15.33.8.64.3345 (10.18.10.3345)

File Size: 138 MB

I downloaded the driver but it couldn't installed... It shows the error

"The driver being installed is not valid for this computer. Please obtain the appropriate driver from the computer manufacturer Setup will exit"

Please somebody tell me the solution what I should do