Windows 8 is the 8th major version of Microsoft's Windows NT based operating system. It was released on October 26, 2012. The biggest change in Windows 8 is the introduction of the Metro user interface that was first debuted in Windows Media Center, Zune but more commonly seen in Windows Phone 7.
Windows 8 is the first of the Windows NT line to require secure booting . Installing Ubuntu on a new Windows 8 computer requires disabling the secure boot feature from the Advanced startup menu in Windows 8.