*Please thumbs up this response to help people who buy this computer* This same problem happened to me, but I have been around computers long enough to know what happened. You need to shutdown and then turn your computer back on with one monitor in. As it loads up, go into the BIOS settings. Then click the button to enter advanced mode. Go through the settings for onboard device config and enable dual monitor support. (It is originally disabled.) Then, you can save and exit BIOS, shut down your PC, and plug both monitors in. Turn the PC back on and it should load up just fine. This worked for me, so hopefully it will help you as well!