While laptops are built to project their own displays, you can transform a spare Windows laptop into an extended screen for your main desktop. Whether you want to expand your screen real estate, or ...

Laptops are practical because you can take them with you. However, laptops have a relatively small screen. If you work on a mobile computer, it quickly becomes annoying to constantly switch programs.

One cable turns any laptop into a dual-screen setup. This 15.6-inch portable monitor weighs 1.7 pounds, fits in a bag, works ...