Check the back of your computer to see how many video ports you've got. And then, just to make sure, check the manual. Laptops: These all have separate VGA ports, and often HDMI or DisplayPort, as well. Plug in a monitor, keep your built-in screen on, and you've got two.But you need more than the ability to plug in two monitors and send signals to them. You have to tell Windows how to manage both monitors correctly.heck the back of your computer to see how many video ports you've got. And then, just to make sure, check the manual. Laptops: These all have separate VGA ports, and often HDMI or DisplayPort, as well. Plug in a monitor, keep your built-in screen on, and you've got two.