Windows 8.1 is an update to Windows 8, a version of Microsoft Windows released in October 2012. Windows 8.1 was released to manufacturing on August 27, 2013, and reached general availability on October 17, 2013. It is available as a free upgrade for retail copies of Windows 8 and Windows RT users.

Windows 8.1 is available in three editions: Windows 8.1, Windows 8.1 Pro, and Windows 8.1 Enterprise. Unlike Windows 8, Windows 8.1 cannot be installed through an upgrade from a previous version of Windows; a clean installation is required.

The Windows 8.1 installation media is a DVD, a USB …