Back in 2018, it became known that Microsoft was creating a new modern version of the Windows 10 operating system for PCs, codenamed Polaris. The operating system was to come out under the name Windows Core OS and include a version of Andromeda for foldable mobile devices.
It was rumored that the new Windows Core OS would fix most of the legacy code and compatibility issues that Windows 10 has. Microsoft later canceled Polaris and Andromeda and switched to Windows 10X, and now an early build of Windows Core OS has been leaked online.
This version dates from 2018 and does not have a graphical interface. Since this is a raw version and may contain various problems, experts do not recommend trying to install it on your main computer. This is an RS3 RTM assembly that is compatible with the ARM32 architecture. This means that the operating system can be installed, for example, on an outdated Surface RT.
Polaris was intended to be a modular version of Windows, offering better flexibility, power management, and performance. Once again, it’s worth noting that this operating system is no longer in development, it has been replaced by Windows 10X due out this spring.