Windows 10 Build 15035 Media Builder May 2026

Many developers argue that 15035 is faster and more efficient than the final official Mobile release (1709). Because it was built right before Microsoft began stripping out features (like the "Glance Screen" and rich notifications for third-party apps), 15035 runs leaner on low-RAM devices.

Windows 10 Build 15035 is not a standard desktop operating system. It is a pre-release build (a beta) from the "Feature2" development branch. It was compiled on February 24, 2017.

Why is this significant? In early 2017, Microsoft was preparing the Windows 10 Creators Update (Build 15063). However, 15035 belongs to a parallel universe—the ill-fated Windows 10 Mobile. windows 10 build 15035 media builder

To understand the builder, we must first understand the build itself.

Assumption: You have legitimate access to the build files (Insider membership or official image). The following is a high-level, prescriptive process commonly used to create bootable media from an ESD/ISO/WIM: Many developers argue that 15035 is faster and

If starting from ESD:

Prepare a working directory with standard Windows setup structure:

Create bootable ISO:

Create bootable USB (optional):

Test:

Windows 10 requires signed drivers and Secure Boot validation. The Media Builder embedded a pre-configured bootloader (based on modified UEFI shims) that tricked the OS into accepting unsigned ARM drivers. For Surface RT users, this meant working Wi-Fi, touch, and storage drivers—things Microsoft deliberately locked in the final build.

Before you spend an afternoon on this, understand that Build 15035 is not a daily driver. If starting from ESD:

If the Media Builder seems too risky or complex, consider these alternatives: