Windows 10, with Cortana, Edge and Xbox gaming, is coming July 29 - LA Times

The newest version of Microsoft Windows arrives July 29. Microsoft announced the launch date for Windows 10 on Monday. Upgrading to the major new edition of its operating system will be free for most consumers with a Windows 8 or Windows 7 machine. Microsoft didn't announce a price for those ineligible for a free upgrade. Nor did it say when the smartphone version would be available. Windows 10 represents Microsoft's first attempt to build an operating system that looks and feels the same regardless of the size of the screen or the type of device being used.