The above symptom is associated with, but not limited to, the following systems:
Before we get to the task at hand, we need to ensure that your system will support dual monitor:You can easily check the back of your PC or the sides of your laptop to see if it has any of the connectors below
Desktops only :If your video adapter has only one DVI port, you will need to purchase a "Y" dongle to attach dual monitors. Be sure to take your computer’s ports into account before you get another monitor for it.
Method 1: By keyboard shortcut "Win+P"
Windows makes using multiple monitors easy. Just plug the monitor into the appropriate port on your computer and Windows should automatically extend your desktop onto it. You can now just drag and drop windows between monitors.
Method 2: By the "Screen Resolution" menu