Windows 10 Build 15035 is a unique, leaked pre-release version of Windows 10 designed for ARM32 (ARMv7)

Look for the latest scripts from the XDA community or the OpenRT GitHub resources.

This is the headline act. The Media Builder could take the x86 (32-bit) version of build 15035 and, using a proprietary repackaging routine, reconstruct it into a bootable ARM32 image. This wasn't emulation—it was native execution. Suddenly, the build could run on early Qualcomm Snapdragon 835 laptops (like the HP Envy x3) and, more famously, on the .

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Since this is an unreleased leak from 2019, it does not receive security updates. How to Get Started

However, during an internal Microsoft security breach in early 2017, an unreleased compiled explicitly for ARMv7 surfaced. The build leaked publicly to the BetaArchive platform on November 24, 2019. The Limitations of the Raw Build

Windows 10 Build 15035 is a significant, albeit niche, milestone in the history of Microsoft’s Windows-as-a-service model. Released during the development phase of the Creators Update (version 1703) in early 2017, this build is not remembered for bringing groundbreaking features to mainstream desktop users, but rather for its significance in the unofficial, community-driven effort to bring Windows 10 to ARMv7 devices, specifically the Surface RT and Surface 2.

Using a Media Builder allows enthusiasts and developers to convert raw update files into a bootable ISO format. This process enables the installation of archival operating system builds for testing, historical preservation, or software compatibility verification in isolated environments. Prerequisites and Required Tools

: While it brings a modern UI to legacy RT devices, it is considered unsuitable for daily use

Microsoft has provided some workarounds for the known issues: