Windows 10X build 20279.1002

Windows 10X build 20279 is a RTM candidate build of Windows 10X released on 14 January 2021. The build was later withdrawn as Microsoft tested builds 20280 and 20281 afterwards, which were never released after development stopped in February 2021. This is currently the last publicly available build of the operating system before its cancellation in May 2021. Unlike the Public Preview builds that used the Manganese semester as their base, this build uses the Iron semester. This release of Windows 10X can be composed using ImageApp and run on Hyper-V.

The package files for the build were removed from Windows Update on 18 May 2021.

The ARM64 version of this build is lost.

Bugs and quirks

 * This build cannot be run on VirtualBox. Attempting to do so will cause the build to refuse to boot with error code 0x08809000.