Microsoft to give away Windows 10 as free upgrade

By Bill Rigby SEATTLE (Reuters) - Microsoft Corp will give away its upcoming Windows 10 operating system as a free upgrade to users of the most recent versions of Windows and Windows Phone, as the world's largest software company tries to hold onto customers in the new mobile era that has largely bypassed it. The announcement by Terry Myerson, who runs Microsoft's operating systems group, is a marked change for Microsoft, which has charged for new versions of Windows, one of its main p