Microsoft revealed pricing of its next major addition to the Windows franchise, Windows 8.1. Licenses to the operating system will sell at US $120 for the standard edition, and $200 for Windows 8.1 Pro. The key purchased at those prices can be used both for clean-installations, and to upgrade from Windows Vista or Windows 7, keeping your files, programs, and settings. Existing Windows 8 users get corresponding variants of Windows 8.1 for free, through Store. A Windows Upgrade Assistant app will be issued to Windows 8 users, which verifies activation, downloads Windows 8.1 resources, and installs the operating system over the existing installation, letting you keep your stuff. Upgrading to Windows 8.1 for Windows 8 users, would be a no-brainer, since you get this awesome Start button on the taskbar which...spawns the "Metro" Start screen. PC enthusiasts get a longer DirectX rope, with the lure for DirectX 11.2, and its shared-resources (mega-textures) feature. People will be able to switch from Windows 8.1 to Windows 8.1 Pro by shelling out $99 on the Pro Pack, which also adds Media Center. Windows 8.1 Pro users can get that for an extra $10. Windows 8.1 is expected to launch on October 17, 2013.