📚 Windows 10 build 20277 lands in Dev channel as Insider testing splits

There's now a temporary split in the Dev channel. What you need to know Windows 10 build 20277 is now available for Dev channel testers. This is one of two new builds released today as the Dev channel splits in two. 20277 will land for everyone automatically, but "seekers" can get 21277 instead. Windows 10 build 20277 is now available for Dev channel Insiders to test and, if you're paying attention, you may notice that's the second build to roll out to the Dev channel today. That's because Microsoft has, at least temporarily, split the Dev channel in two. Here's a look at what's going on. Starting today, Microsoft is giving Dev channel Insiders the option to start testing builds from the RS_PRERELEASE branch, which is where build 21277 comes in. You have to opt in to testing from this branch, and you'll continue to receive builds from RS_PRERELEASE going forward if you do. If you decide not to opt in, you'll stay testing builds from the FE_PRERELEASE branch, which receives bui... ...