Your computer may already be able to support multiple monitors. On the computer itself, look for ports for video connections like DisplayPort, DVI, HDMI and VGA. These ports are typically grouped together on the back of the computer. If you only have a single video port, then your hardware as it is might not support multiple monitors. In that case, you will either want to add the necessary additional video hardware or consider taking the computer to your local Micro Center Service Department to look into upgrade options.