I have a Asus Q550L with a Nividia Geforce GT 745m video card running Windows 8.1 and the video card is not being used over the Internal Graphics.
Inside of device manager I am presented with the following: http://imgur.com/a/tD8F9
I've tried uninstalling and reinstalling updated drivers as directed by NIVIDIA online help, only to achieve that same result. I've also tried it in safe mode to the same result. I've checked the BIOS, but I didn't really see anything in that which seemed like it would be very helpful. Opening the Nividia control panel doesn't work, originally it just tells me that I'm not using a display connected to a Nividia GPU. However, now nothing happens after I click it. Any help would be greatly appreciated!