Microsoft has announced Windows 11, the first major update in six years of its widely used computer operating system. The new version has a simplified design. It also adds new tools to help users better organize their desktop workspace for working on several different tasks at once. Windows 11 also brings Android apps to Windows for the first time and includes improved gaming performance, Microsoft said in an announcement last week. In a video event, Microsoft chief executive Satya Nadella said the changes represent “the beginning of a new generation of computing.” He added that with Windows 11, the company was “reimagining everything.” The new operating system (OS) is expected to become available later this year on new computers and other devices. It will also be offered as a free upgrade for users of Windows 10, the last operating system Microsoft released in 2015.