Microsoft releases two new Windows 10 previews for 19H1 and 20H1

Microsoft today released two new Windows 10 previews for PCs, the first time it’s done so in 2019. The first build is from the 19H1 branch, which represents the Windows 10 update that will arrive in the first half of this year, and the second is from the 20H1 branch, which will arrive in the first half of 2020.

Microsoft has released two new builds on the same day before, but never for two updates that are so far apart. The company is simply more comfortable developing multiple major Windows 10 updates at once.