Clues point to Windows 10 Anniversary Update code lock-down after July 12

Microsoft is just six weeks away from releasing the next major upgrade of Windows 10, but according to past practice, will likely lock down the code in less than half that time.
The release date for what is being called "Windows 10 Anniversary Edition" has not been confirmed by the company, although the name itself hints at July 29, a match for last year's debut launch.
But other signals, and Microsoft's moves prior to the past two releases -- the original in July 2015 and the first major upgra