Windows 10 Build 15035 Media Builder Install Info

Important Note: This is not a standard consumer ISO. It is an internal Microsoft build used for testing on ARM64 devices (like the Lumia 950/XL, Surface RT successors) and early Snapdragon PCs. Installing it on x86/x64 PC hardware will fail unless you are using a specific emulation layer or have an old ARM32 device.

2. Prerequisites and System Requirements

7.2 Stability Notes

• The Media Builder tool itself is beta – expect UI freezes.
• Always create a restore point or VM snapshot before using advanced features.

Option A: Fresh Install on a Virtual Machine (Recommended)

1. Create a new VM in VirtualBox or VMware Workstation: windows 10 build 15035 media builder install

   • Type: Windows 10 (64-bit)
   • RAM: 3072MB
   • HDD: 32GB VMDK
   • Enable EFI (but set “Legacy Boot” as fallback)

2. Mount the ISO to the virtual DVD drive.

3. Boot from ISO. Press any key when prompted. Important Note: This is not a standard consumer ISO

4. Installation steps:

   • Language: English (US) – other languages will error out.
   • License terms: Accept.
   • Installation type: Custom: Install Windows only (advanced).
   • Driver warning: Click “OK” when warned about missing drivers – this is normal for pre-release builds.

5. Setup completion – The system will reboot twice. After 15 minutes, you’ll reach the OOBE (Out of Box Experience). The Media Builder tool itself is beta – expect UI freezes

6.3 Uninstalling / Cleaning Up

To remove Build 15035:

• Format the partition if dual-booting.
• Or delete VM.
• Remove Media Builder temporary files from %TEMP%\MediaBuilder.

Part 5: Why Would Anyone Use Build 15035 in 2026?

Option A: Direct FFU Flashing (Lumia phones)

1. Install Windows Device Recovery Tool (to get drivers).
2. Use thor2 command-line tool:

   thor2 -mode ffu -ffile "15035.ffu" -do_full_nvi_update -do_factory_reset