Last week’s Windows 10 update to beta testers is almost certainly the final code for this year’s big upgrade, set to release on Aug. 2.
Build 14393 was issued to participants in Microsoft’s Windows Insider preview program last week, first on July 18 to those who had selected the “Fast” track, then two days later to users on the “Slow” ring.
(Since then, it was re-released on Friday with a follow-up fix; other patches may appear between now and Aug 2.)
The sequence of Fast, then Slow, both within days, has been a one of the final moves in previous Windows 10 launches, and has been a cue that the code has been locked down. During development, those releases reach users at much longer intervals.