I am sorry to hear you are having problems installing the driver but let me help you.
It is important to mention that the drivers we have from our side are generic drivers for OEM systems. Since you have an external video card in your system, I recommend you disconnecting the video card first and then uninstalling the current graphics driver installed in your system. Here are the steps to uninstall the driver:
Once you have uninstalled the driver please download the latest driver for your controller at the following link:
If you are getting a message during the installation of the driver, please try the manual driver installation. Here you have the steps: