Windows 10 preview build 19551 rolls out to Fast ring Insiders

It’s time to crack open Windows Update again.

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What you need to know

Microsoft today released anotherWindows 10preview build for Insiders on the Fast ring. This release pushes the build number up to 19551, but it doesn’t contain any major new features. Rather, this update is mostly concerned with a handful of bug fixes, and there are some known issues still sticking around.

Alongside the release of build 19551, Microsoft also revealed that it is halting testing of “Project Catnip,” its Progressive Web App (PWA) meant to act as a hub for Insider news, release notes, and more. From Microsoft:

We’re no longer planning to do external testing or a public release of our “Project Catnip PWA” for the Windows Insider Program. Due to some technical limitations, we were not going to be able to offer the experiences we wanted to for Insiders through the PWA. We’re still looking at solutions for some of the features we investigated in the PWA. Thank you as always for your enthusiasm.

Here’s a full look at the release notes for Windows 10 build 19551:

General changes, improvements, and fixes for PC

Known issues

For more on this build, you can check out Microsoft’s full release notes at theWindows Blog. Otherwise, Insiders enrolled in the Fast ring can download build 19551 now via Windows Update.

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Dan Thorp-Lancaster is the former Editor-in-Chief of Windows Central. He began working with Windows Central, Android Central, and iMore as a news writer in 2014 and is obsessed with tech of all sorts. You can follow Dan on Twitter@DthorpLand Instagram@heyitsdtl.