Right-click the conversion batch file ( uup_download_windows.cmd or decrypt.cmd ) and select . Select the option to create a Standard ISO image .
After Media Builder completes:
via specialized community tools rather than the standard Microsoft Media Creation Tool. Prerequisites & Tooling
Update Microsoft Surface RT Tablet to Windows 10 [Unofficial Upgrade] windows 10 build 15035 media builder install
Installing Windows 10 build 15035 on an ARM device like a Surface RT is a fascinating but challenging project reserved for dedicated enthusiasts. The process, powered by the community's Windows 10 Build 15035 Media Builder tool, breathes extremely limited life into old hardware, but it is fraught with risks and significant compromises.
: Hold the Volume Down button and press Power on the Surface RT to boot into the installation environment. Important Limitations
The Media Builder tool modifies a standard Windows RT 8.1 recovery environment to inject a custom pre-installation script ( CustomPE ). This lets you deploy the unreleased Windows 10 image directly onto the tablet's storage. Right-click the conversion batch file ( uup_download_windows
For detailed technical guides and to download the necessary mod kits, you can visit the WindowsOnARM32 GitHub repository to prepare your USB drive? Windows 10 build 15035 - BetaWiki 12 Dec 2025 —
Ensure the file architecture matches your target system (x64 or x86).
Select your language, time format, and keyboard layout, then click . Click Install Now . Prerequisites & Tooling Update Microsoft Surface RT Tablet
Then, the progress bar jumped to life.
Enter the motherboard BIOS/UEFI menu (usually by tapping F2, F12, or Del during startup).
The User Account Control prompt flashed, a jarring blue rectangle asking if I was sure. I clicked Yes .
The process is a journey into Windows history. While it requires patience—hunting down UUP files, running command-line scripts, and tweaking BIOS settings—the reward is a pristine, lightweight, and unique version of Windows 10 that you will not find anywhere else.
Installing Windows 10 Build 15035 on ARM32 devices like the Surface RT and Surface 2 involves using a specialized Media Builder tool to flash a leaked ARM image. This process requires a pre-installed "jailbreak" to bypass locked bootloaders, allowing users to upgrade from Windows RT 8.1 to this experimental build. Detailed video walkthroughs are available to guide through the process at Installing Windows 10 on a Surface RT