A few hours ago, Microsoft released the Windows 10 October 2020 update (20H2) Build 19042.508 (KB4571756) for the Insiders in the Release Preview Channel. According to them, this is the final build though they are still working on the overall experience, meaning they will continue to service patches.
The update is just an enablement package that bumps on to the May 2020 update and increases the build number by one. It works the same way as the Windows 10 November 2019 update (version 1909). The Insiders’ update in the Release Preview Channel won’t be installed the update automatically as it is opened to “seekers” experience, meaning it can only be installed via Windows Update. Here is what Microsoft mentioned in their blog post:
We are continuing to prepare the Windows 10 October 2020 Update (version 20H2) to be ready for release. Today, we are releasing Build 19042.508 (KB4571756) to Windows Insiders in the Release Preview Channel. We believe that Build 19042.508 is the final build and still plan on continuing to improve the overall experience of the October 2020 Update on customers’ PCs as part of our normal servicing cadence.
Moreover, Beta Channel Insiders will be offered the October 2020 update automatically via Windows Update. The Windows Insider team also mentioned the build has a known issue of “Element not found” when trying to start WSL (Windows Subsystem for Linux). However, its root cause has been found, and a fix will be included in the next 20H2 servicing.
We expect the Windows 10 October 2020 update to be released publicly anytime in October as there is no date available and could be delayed if any error bugs pop up.