This is limited to members of the Windows Insider Program running previews of Windows 10 19H1. Those builds are still only available on the Fast Ring branch. Users running on the Slow Ring and Release Preview are still running Windows 10 version 1809 (October 2018 Update) previews. Through the Bug Bash, Insiders need to complete quests and fill surveys tailored to 19H1 features. If a bug is discovered, users can submit the finding to Microsoft. The company will then work on fixing the bug before release to manufacturing (RTM). The Bug Bash can be a big help to Microsoft, allowing the company to release a more stable version of Windows. However, the October 2018 Update showed us that plenty of bugs can slip through the net to the release version. Microsoft will surely be hoping Windows 10 19H1 is significantly more stable that its troubled predecessor. Plenty of new features have already been revealed for 19H1. Microsoft is going to release the build to all users this spring, with April the most likely launch date for what will be Windows 10 version 1903.
Learning from the Past
As usual, the release will be rolled out in stages. However, that roll out may well take longer than normal to kick into gear. Microsoft is still reeling from the problematic launch of Windows 10 late last year. Windows 10 version 1809 was paused by Microsoft just days after its launch. Nearly two months of bugs followed as Microsoft attempted to secure the build. Since then, the October 2018 Update has been rolling out again, albeit cautiously.
