Microsoft is believed to be on track to release Windows 9, the next major version of the desktop operating system, in April 2015 and is expected to make an announcement at BUILD 2014.
Paul Thurrott, known for revealing information about Microsoft products, has published on his website,
SuperSite for Windows, a detailed roadmap leading to the Windows 9 release in April 2015. In order to distance itself from the bad reputation of Windows 8 with the masses, Microsoft is reportedly planning to move on to the Windows 9 moniker with the next major release.