1. Go into the bios.
There are 2 options in the bios for video card.
1) Run the laptop only with Intel HD Graphics
2) Run the laptop with Nvidia Optimus
2. Go to your desktop and right click and choose the "Nvidia Control Panel". Once that opens click the "Manage 3D settings" link. In there you can change the global settings to use the Nvidia card instead of auto selecting one.