Hello, i have a dell inspiron 15r with switchable graphic 7670m + intel(R) HD 4000, my OS window 8 64bit single language, my 7670m current driver 8.982.6.0 (01/08/2012).

I downloaded the latest graphic card version 8.982.6.0 A03 (new 2013)from Dell official website. Now i have some problem , i can't update my driver . This is the list what i did:

1/ I ran the driver file directly without uninstalling the current driver, chose install button. After some minutes, AMD catalyst manager came up. I chose custom install, checked all option then then hit Install. The program ran really fast, then the error pop-up: "Inf package not found". Failed.

       2/ I uninstalled the current graphic driver (device manager), uninstalled the current AMD catalyst manager , reboot. Then i ran the new driver file again, chose option ,bla bla bla... got same error pop-up : "Inf package not found". Failed.  

       3/ Turned off firewall, set UAC to lowest, uninstalled anti-virus, i installed the stock driver in Dell CD, ran the new driver file and chose "Extract without install". After that, I ran Device manager -> chose update driver, chose "Browse my computer for the driver" -> chose "Let me pick from a list of device driver on my computer"-> browsed to the driver folder contain new Inf file and chose it -> chose the line "AMD Radeon HD 7670M -> hit install. After some minutes, system showed some error : "Window found the driver but encountering some problem so the installation have to be stoped. Access is denied". Not  exactly what i saw , but that what the error report mean. Failed 

4/ Boot up with safe mode, removed the driver that window auto installed, removed all  AMD, Ati folder in C:\ . Then boot normally, window auto installed the stock graphic again. Installed AMD calatyst manager-> reboot -> ran AMD manager -> chose Graphic adapter then hit install. Wow it showed up Install complete, success? NO, it showed up "Installation complete (warning occurred, see the log file". After reboot, i opened Device manager, checked graphic driver, omg, the stock driver still there. FAILED. Wasted a whole day.

If anyone know how to update successfully, plz show me.  Btw, sorry for the long post, for my bad english too. Waiting for some answer. 

Good day.