Microsoft releases Windows 10 builds 20277 and 21277 to the Dev channel December 11, 2020 by admin Tweet Today, Microsoft released not one but two new Windows 10 Insider Preview builds to the Dev channel. One of them is from the fe_release branch, while the other is a return to rs_prerelease. Read more… Neowin Related Posts:Microsoft will not drop new Windows 11 Insider Dev…Windows 11 Insider Preview Build 22621.575 and Build…Microsoft releases two Windows 11 builds (22621.290…Microsoft won't roll out Windows 11 Insider Builds…Windows 11 Insider Canary Channel preview 25931 adds…