Windows is a group of several proprietary graphical operating system families developed and marketed by Microsoft. It is an operating system that allows you to use a computer and comes preloaded on most new personal computers (PCs) . Windows is the most popular desktop operating system in the world, with a 70% market share as of March 2023, according to StatCounter. Windows allows you to complete all types of everyday tasks on your computer, such as browsing the Internet, checking email, editing digital photos, listening to music, playing games, and much more. A window is a separate viewing area on a computer display screen in a system that allows multiple viewing areas as part of a graphical user interface (GUI) . Windows are managed by a windows manager as part of a windowing system. A window can usually be resized by the user, stretched on any side, minimized, maximized, and closed.