looks like you have a driver conflict/issue... had the same problem on an acer notebook... u need to do this... uninstall chipset driver and display driver... install chipset driver first, then install display driver... note that the order of install in important if you face this issue
Go to Device Manager to uninstall chipset drivers. Sometimes it will also find a conflict or other problem there when you view the device in question and can possibly fix it. Start -> Run -> compmgmt.msc
I tried what you said but no good how do you uninstall the chipset drivers from Device Manager ? there is no such option.
Open Device Manager, then find the device you want to install. Right Click -> Uninstall --or-- Right Click -> Properties -> Driver tab -> Uninstall (button) ctrl+shift+esc to bring up Task Manager, make sure dwm.exe (Desktop Window Manager) is running. Did you by chance install some UXTheme patch? Or install a theme over your default one without patching?