DV7-6113cl SM BUS CONTROLLER missing driver

HP DV7-6113CL

Bought Windows 7 Ultimater and upgraded from Windows 7 Home premium.

Keep getting a unknown device error in device manager:
SM Bus Controller 

First ran Windows Update to install drivers after installing Windows 7 Ultimate and experienced error for SM Bus Controller in device manager. I installed all the drivers on the HP webiste for my model of laptop but its to no avail. Then tried to install AMD Radeon HD drivers still to no avail. Don't know what to do.

Thanks