Windows 8.1 Update 1 was supposed to debut at BUILD 2014, next month, together with Windows Phone 8.1 and whatever other product Microsoft has prepared. Turns out that the Update 1 has already leaked today, via a registry hack.
Earlier this week we found out that MS had finalized the Windows 8.1 Update 1 and that it was ready for release to manufacturers. The update could be downloaded via a registry change, that was done through that was fixed in the meantime. The links were actually meant for Microsoft employees, who were testing the software, not for general use.
Changes in Windows 8.1 Update 1 include showing Windows 8 apps on the desktop taskbar, showing the desktop taskbar above Windows 8 apps and a new title bar at the top of the Windows 8 apps. Said title bar offers options for minimizing, closing or snapping applications. Finally, we get a new shutdown and search button on the start screen.