[header] How to set up a second monitor with windows 10 [title] Make sure your computer can support a second monitor. [step] Not all graphics cards can support multiple monitors. If your computer cannot support more than one monitor, then this will not work. 
You could try right-clicking on the desktop and select " graphics properties.. ", or see here for 3 ways to [substeps] Another easy way to find out is that if the graphics card has to places to connect your cable to.