The Windows 10 spring update RTM build is now in the Release Preview ring April 5, 2018 by admin Tweet Microsoft today released Windows 10 for PCs Insider Preview build 17133 to the Release Preview ring. It’s the RTM build for the upcoming spring feature update, so the public release is imminent. Read more… Neowin Related Posts:Windows 10 22H2 Release Preview Insider build…Windows 11 23H2 Insider Release Preview Channel…Windows 11 24H2 Insider Release Preview Channel…Windows 11 (original release) Insider Release…Windows 11 24H2 Insider Release Preview channel…