Microsoft has confirmed that its next flagship operating system, Windows 10, will launch on Wednesday, 29th of July



From Techradar:

The product will be available in 190 territories globally with existing Windows 8.1 and Windows 7 users having one year (i.e. till 29 July 2016) to upgrade to the new operating system. The current build, 10130, could well be to be the penultimate one with Microsoft likely to launch one or more builds before the final version.

  Windows 10 to launch on July 29