Windows 10 build 9879 was release nearly a week ago, but only to a limited number of Windows Insider Program participants



From Neowin:

According to Gabriel Aul, Microsoft is almost ready to push out the new build (9879) to 'slow ring' participants. The new update to Windows 10 has a vast amount of improvements over the previous build and has been explored in great detail on Neowin over the past week.

Although the release is imminent, Aul did state that they are "waiting to publish a bugcheck hotfix concurrently."

  Windows 10 build 9879 going out to slow ring participants soon