Hai there,
I have purachsed HP Pavilion 15-n039tx Notebook ( http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=c03964922 ) which has got a 2GB dedicated graphic card (AMD Mobility Radeon HD 8670M). I have downloaded the driver given in your site. While installing it, it gives the following error " Application Install : Install package failure!" I am running Windows 8.1. Have downloaded drivers 3-4times and tried installing but gives the same error. Tried again by re-installing Windows again but same problem. Then i downloaded its driver from AMD's site but again same error was shown. In device manager only Intel 4000 graphic card is shown. PLEASE HELP ME!!