Microsoft Windows is a piece of software called an operating system. An operating system does what its name implies—it operates your computer system, working in the background every time you turn on your PC. The desktop that fills your screen is part of Windows, as is the taskbar at the bottom of the screen and the big menu that pops up when you click the Start button.
Windows 10 is the latest version of the Microsoft Windows operating system, the successor to Windows 8/8.1. If you used Windows 8 or 8.1, you’ll appreciate the return to the traditional desktop and Start menu of the popular Windows 7.