Windows 9, codename Threshold, is rumored for an April 2015 release date. This information is known and comes from Paul
Thurrott, a well-known Microsoft insider. Now, according to a new rumor
, Microsoft will offer a preview version of the new operating system in February of 2015.
Similar to the Developer Preview or Consumer Preview of Windows 8, Microsoft is rumored to offer a public preview build of Windows 9 sometime in February of 2015 - giving consumers a chance to play with the new operating system before it's official release. This information comes from a leaker by the name of "Faikee," who was recently responsible
for dropping the Windows 365 name, along with other tidbits.