How to Make a Computer Recognize Two Monitors at Once


It is fair to say that two computer monitors are better than one for most multitasking activities on a PC. Many laptops have additional display connection ports, such as for the blue VGA cable running from an LCD monitor or the yellow S-video cable leading to a TV. Desktops also support additional graphics cards that attach to the motherboard, supplementing the native display capabilities. PCs have numerous possibilities for using a second display device. After you have figured out your physical hardware setup, you can use display functions in Windows to replicate the screen on both monitors.

  • Press the "Windows logo" and letter "P" keys on the keyboard simultaneously. The "Windows logo" key is usually at the bottom of the keyboard, between the "Ctrl" and "Alt" keys.

  • Click the square in the pop-up dialog box labeled "Duplicate."

  • Wait while Windows sends a video signal to the secondary monitor, in addition to the primary monitor. After the process is complete, move the mouse cursor around on the desktop. The movements should be identical if the duplication process is successful.

Tips & Warnings

  • For laptop owners, use the "Windows Mobility Center" to change from single to duplicate display screens. Press "Start," and then type "Mobility" in the search box at the bottom of the "Start" menu. Press "Enter" to open the "Windows Mobility Center."

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  • Photo Credit Jetta Productions/Lifesize/Getty Images
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