In the fast-paced world of software development, certain versions of an operating system take on a mythical quality. Build 15035 of Windows 10 is one such artifact. Released internally by Microsoft in early 2017, this particular build (which ultimately led to the Creators Update, version 1703) has gained a niche but passionate following among collectors, developers, and retro-computing enthusiasts.
Why? Because Build 15035 is often considered the "last pure" version of Windows 10 before telemetry became aggressive, and it contains unique debugging tools and a lighter memory footprint than later releases.
However, installing this specific build is not as simple as downloading an ISO and clicking "Setup." The official channels are long closed. This is where the Windows 10 Build 15035 Media Builder comes into play. This guide will walk you through everything you need to know about acquiring, building, and installing this elusive operating system.
| Error | Likely Cause | Solution |
|-------|--------------|----------|
| 0x80070570 | Corrupt install.wim | Re-download build, verify SHA-1 hash |
| The product key is blocked | Used wrong key | Use generic VK7JG-NPHTM-C97JM-9MPGT-3V66T |
| Black screen after boot | Graphics driver conflict | Boot into Safe Mode (F8) → uninstall display driver |
| Media Builder crashes at 40% | Antivirus interfering | Disable real-time protection temporarily |
| “This PC can’t run Windows 10” | NX/PAE missing | Enable “No Execute Memory Protect” in BIOS |
| Time bomb still active (reboots) | Patch not applied correctly | Run the Media Builder again, choose “Force Patch syswow64” |
Select options:
Successful output:
Build 15035’s Media Builder supports silent switches:
MediaBuilder.exe /quiet /arch x64 /edition pro /media iso
MediaBuilder.exe /usb F: /autoformat
These are not officially supported but function in this build.
End of Paper
This review evaluates the installation and performance of Windows 10 Build 15035 (Creators Update) for ARM32 (ARMv7)
, an unofficial, leaked build frequently used by enthusiasts to upgrade legacy Surface RT devices from Windows RT 8.1. Overview of Build 15035
Build 15035 is historically significant as the only leaked Windows 10 client build compatible with ARMv7 processors. It was originally compiled in early 2017 but only became publicly available via BetaArchive in late 2019. Target Devices: Primarily used for unofficial upgrades on Surface RT Media Creation: windows 10 build 15035 media builder install
Installation typically requires specialized community-made scripts like Media Builder Fastwing RT
to prepare the installation media and handle necessary jailbreaks. Installation Experience
The installation process is not standard and requires several technical workarounds: Preparation:
Users must create a recovery drive and use community scripts to assemble the install media. Jailbreak Requirement:
A jailbreak is necessary to boot the Windows 10 image on devices with locked bootloaders, such as the Surface RT On legacy hardware like the Surface RT , the setup can take approximately
, largely due to the slow speed of the eMMC storage and USB 2.0 interface. Performance and Usability While Build 15035 provides a modern Windows 10 UI, it is not suitable for daily use
Performance is significantly slower than the original Windows 8.1 RT. Software Compatibility: Supports versions of Office 2013 RT
and standard inbox apps like Remote Desktop, which works well. Missing/Broken:
Cameras do not work on Surface hardware by default due to missing Frame Server support. Many apps fail to start without manual installation of dependencies like Visual C++
The built-in Edge browser is notably slow and has difficulty loading modern websites like YouTube. Hardware Issues:
Drivers for the NVIDIA eMMC storage controller were officially dropped in later developments, requiring users to manually replace the driver with older versions to prevent boot crashes. Build 15035 In the fast-paced world of software development, certain
is a fascinating technical experiment for hobbyists but a poor choice for productive use. Modern Windows 10 Interface on legacy hardware Extremely slow performance and UI lag Better support for some UWP apps Broken hardware features (Cameras, Bluetooth issues) Functional Remote Desktop and Office High risk of system instability and crashes Active community support for porting apps Tedious, unofficial installation process Recommendation:
Only install this if you are an enthusiast looking to experiment with legacy ARM hardware. For anyone needing a reliable tablet experience, the original Windows RT 8.1 remains the more stable, albeit limited, choice. installation guide for using the Media Builder tool with this specific build?
Installing Windows 10 ARM on Surface RT 1 (+ First Impresions)
The Legacy of Build 15035: Revitalizing Abandoned Hardware Windows 10 Build 15035 represents a unique moment in computing history, serving as the bridge between official support and enthusiast-led preservation. Originally an internal "Creators Update" preview compiled in February 2017, this build achieved legendary status because it is the only leaked client version of Windows 10 designed for ARM32 (ARMv7) architecture. While Microsoft officially ceased supporting the Surface RT and other early ARM tablets with Windows RT 8.1, the discovery of Build 15035 allowed users to bypass these limitations and experience a modern desktop environment on otherwise "obsolete" hardware. The Role of the Media Builder
Installing this build is not as simple as using standard Microsoft tools. Because Build 15035 was never publicly released, the community developed specialized tools like the Windows 10 Media Builder and various Mod Kits to assemble the necessary files.
Assembly: Users typically download a "kitbash" of leaked installers and system updates to create a custom install.wim image.
Jailbreaking: Installation on devices like the Surface RT requires significant workarounds, including rooting the device, disabling Secure Boot (on Surface 2), and applying custom patches to allow the new OS to boot.
Media Creation: The builder automates the extraction and preparation of these files into a bootable USB format, often requiring specific scripts to be run as an administrator to target the unique ARM hardware. Practical Realities and Challenges
Despite its novelty, Build 15035 is widely considered unsuitable for daily use. It is a pre-release build with several persistent bugs: Office 2013 RT Media Builder | Windows RT Devices GitBook
Installing Windows 10 Build 15035 is an unofficial process specifically used to breathe new life into older ARM32 devices like the Surface RT or
. Because this build was a leaked internal version of the Creators Update, it requires a specialized "Media Builder" tool to create a bootable installer. 1. Preparation Requirements Select options:
The process must be performed on a separate x86/x64 PC running Windows; you cannot create the media directly on the tablet. USB Drive: A blank drive with at least 8 GB of space. Media Builder Tool
: Download the unofficial Windows 10 Media Builder (often found in communities like Open Surface RT or i12bretro).
Recovery Image: You may need the official Surface Recovery Image for your specific model to provide base drivers. 2. Building the Installation Media
Extract the Tool: Place the downloaded Media Builder .zip into the root of your C:\ drive.
Run the Builder: Right-click Build.cmd and select Run as administrator.
Configure Options: The command-line tool will prompt you for several choices: Device Target : Select the number corresponding to your hardware (e.g., Surface RT
Packages: Choose whether to include the App Pack, Office 2013 RT, or uninstall features like BitLocker or Cortana.
Setup Mode: Use Mode 1 (Default Windows Setup) and WIM compression for the best results.
Create USB: When prompted, insert your USB drive, enter its drive letter, and confirm to format and write the files. 3. Installing on the Device Once the USB is ready, move to your Surface RT Windows 10 | Open Surface RT
Windows 10 Build 15035 is a leaked ARMv7 (ARM32) build of the Windows 10 Creators Update. It is primarily used as an unofficial upgrade for abandoned Surface RT and Surface 2 devices. Because this is not an official release, standard Microsoft tools cannot be used to install it; instead, enthusiasts use a community-developed Windows 10 Media Builder tool. Prerequisites A working Windows PC to run the media builder tool. USB Flash Drive: At least 8GB. Target Device: A Surface RT or Surface 2 tablet.
Media Builder Tool: Download the unofficial Windows 10 Media Builder (often found on community sites like GitHub or BetaWiki). Step 1: Create Installation Media Installing Windows 10 on a Surface RT