I got a new video card a few months ago when my old card fried, and it had a different port for a second monitor than my previous card. I finally got around to buying the appropriate adapter, a DVI-D to VGA HD Adapter. I plugged it in, and...nothing. I uninstalled and reinstalled the drivers for my Nvidia Geforce GTX 750 video card, and...nothing. I tested the monitor by plugging it into the primary port, and it works fine. I cannot figure out why I can't get my computer or my video card to recognize that there are two monitors connected to it.