Old Windows Core “Polaris” build leaks, confirming that the ex-Microsoft project was a real thing

2 min. read

Published on January 4, 2021

published on January 4, 2021

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If you’re a close follower of Windows and Microsoft, you might remember the rumors of an operating system known as Polaris. It was believed to be a streamlined flavor of Windows Core OS for new PCs, cutting out legacy features in favor of better battery life, and performance on lower-end hardware. It was eventually canceled in favor of Windows 10X, but an early build of Polaris recently leaked online, confirming the project was actually once a thing at Microsoft (via Windows Central.)

Interestingly enough, this early Polaris build is designed for ARM32 PCs, like the Surface RT. However, it’s not really something to install, as there’s no Windows Shell, and there are no apps in the release. Zac Bowden reports that the leak is an RS3 RTM build, confirming that Microsoft has been working on the project since at least 2017. Again, though, there isn’t anything new or anything most people can play with in this leaked build. It’s rather designed for professionals who are interested in tweaking and exploring an unreleased version of Windows.

While there isn’t much to this leaked build, it’s still something you might want to check out. We don’t endorse or recommend installing it, but it’s available dow download on the Internet Archive.

Radu Tyrsina

Radu Tyrsina has been a Windows fan ever since he got his first PC, a Pentium III (a monster at that time). For most of the kids of his age, the Internet was an amazing way to play and communicate with others, but he was deeply impressed by the flow of information and how easily you can find anything on the web. Prior to founding Windows Report, this particular curiosity about digital content enabled him to grow a number of sites that helped hundreds of millions reach faster the answer they're looking for.