 It was distributed without charge to Windows 7 and 8.1 users for one year after release.A number of new features like Cortana, the Microsoft Edge web browser, the ability to view Windows Store apps as a window instead of fullscreen, virtual desktops, revamped core apps, Continuum, and a unified Settings app were all features debuted in Windows 10.Microsoft has announced that Windows 10 will be the last major version of its series of operating systems to be released.