Microsoft Launched its Windows 8.1 Preview this week by David Hutton 28th June 2013

Microsoft Launches Windows 8.1 Preview. Talk is positive on the changes. The Start Button is revived. New features – Deep SkyDrive Integration, Smarter Search tool and more…

http://techcrunch.com/2013/06/26/microsoft-launches-windows-8-1-preview-with-start-button-deep-skydrive-integration-smarter-search-tool-more