Microsoft has managed to confuse us (again) about its Windows 10 upgrade policy. Last week, it said Insider Program preview users would "receive the Windows 10 final release build and remain activated." The offer sounded too good to be true since it meant that virtually anyone could get a free copy (though many folks may feel they've earned it for testing the buggy preview). However, Microsoft quietly removed the "remain activated" part and added a disclaimer that only Windows 7 or 8.1 license owners would get Windows 10 for free when it arrives on July 29th.

http://www.engadget.com/2015/06/22/m...free-upgrades/