Microsoft today released a new Windows 10 preview for PCs with four bug fixes and one small change. This build is from the 19H1 branch, which, as its name indicates, will arrive in the first half of next year. Microsoft is simultaneously in the process of finalizing the RS5 branch, which represents the Windows 10 update the company plans to release in October. Windows 10 is being developed as a service, meaning it receives new features on a regular basis. Microsoft has released five major updates so far: November Update, Anniversary Update, Creators Update, Fall Creators Update, and April 2018 Update.