Good morning, friends! Microsoft has released a new Windows 10 pre-build number 21277 for Windows Insider program members using the Dev channel (formerly “Early access”).
Full build number: 21277.1000.rs_prerelease.201207-1443
As mentioned earlier, Microsoft has given insiders on the Dev channel the ability to get builds from the RS_PRERELEASE branch. These builds will be offered as an optional update in Windows update for those who manually check for updates. This means that insiders need to independently confirm the installation of the build from the RS_PRERELEASE branch. This method of distributing assemblies is temporary. Microsoft plans to move all insiders on the Dev channel to builds from the RS_PRERELEASE branch after the holidays.