Microsoft has announced today the release of Windows 8.1 Preview during Build 2013 conference, great news for Windows app community.
its a free update to Windows 8 coming later this year, and a prerelease version is available now for you to try. Windows 8.1 has new ways to personalize PC and includes a wave of awesome new apps and services.
One can download from the below link.
Lots of cool features Built in Cloud Storage , you can boot now directly to desktop..etc