Following the release last week of the Windows 10 PC preview build 10586 for Windows Insider members in the Fast Ring, the company has now issued the same build for members who have elected to get updates via the Slow ring.
Like last week's release, this new build just has some bug fixes and improvements. It's likely that build 10586 will also be the one that will be released for all Windows 10 users as the Fall Update for the operating system. Our sources have told us that will happen on Thursday, November 12.
Source: Gabriel Aul (Twitter)