Security News > 2021 > January > Microsoft's unreleased Windows Core Polaris OS leaks online

A development build of Windows Core Polaris was leaked online yesterday, proving that Microsoft was actively developing the operating system designed for low-performance devices.
For those unaware, Microsoft has been secretly working on a modular version of the Windows platform codenamed "Windows Core OS." With Windows Core OS, Microsoft planned to offer different flavors/SKUs of Windows for various form factors, such as phones, 2-in-1s, dual-screen PCs, and collaboration devices.
Using Windows Core OS, Microsoft initially created two flavors of Windows - Andromeda for mobile devices and Polaris for traditional laptops.
Windows Core OS: Polaris, Andromeda and 10X. Microsoft canceled Polaris after they started working on a new SKU of Windows Core OS called "Windows 10X.".
Like Polaris, Microsoft has also canceled Andromeda OS, a small screen optimized version of Windows Core OS for mobile devices, such as the Surface Duo and HP Elite x3.
Microsoft has swapped out Andromeda OS with Android on its Surface Duo, and Polaris has now been succeeded by Windows 10X, another Windows Core OS-powered operating system that would work on any form factor.
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