https://wccftech.com/windows-10-2020-build-18990/ > Microsoft has started to release Windows 10 2020 (branch 20H1) Insider Preview Build 18990 to those in the Fast ring. The Windows maker released a build for Insiders in the Release Preview ring last night. As a reminder, Insiders in the Fast ring are testing the 2020 version while the Slow and Release Preview rings are currently testing the upcoming Windows 10 1909 aka the October 2019 Update slated to be released in the next few weeks. > Today’s Windows 10 2020 build 18990 brings a long list of general fixes and improvements, but here are the new features arriving today to the Fast ring.