Windows 8.1

Windows 8 is an operating system by Microsoft. It is a free upgrade for existing Windows 8 users. It replaced Windows 8 and has been succeeded by Windows 10 in late July 2015.

RTMs

 * When you hover over the top of a Metro app, Windows shows a title bar with minimize and close buttons.
 * Right-clicking on the Start screen opens up a menu instead of the touch-oriented controls at the bottom.
 * You can pin Metro apps to the taskbar.
 * A power button has been added next to the search button on the start screen.