How to reinstall Windows 11 Home on a Snapdragon X Elite device

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How to reinstall Windows 11 Home on a Snapdragon X Elite device

Table of Contents

• What you’ll need
• Installation steps
  • 1. Create a WinPE boot device
  • 2. Create a Windows for ARM 11 24H2 (or newer) ISO file
  • 3. Retrieve the install.win file from a Windows on ARM installation ISO file
  • 4. Create the installation scripts
  • 5. Setup your device for installation

Note

As of June 2024, Snapdragon X Elite devices are still very new and support for installations of Windows on ARM by the consumers is not (yet) as straight forward as "burning" an ISO file supplied by Microsoft onto a USB drive like for their x86 counterparts. Currently, the only way to get a USB device to boot is to use an EFI partition created with diskpart or a WinPE boot drive.

What you’ll need

• A machine that is up and running - on Windows preferably but a Windows VM in macOS or linux is also fine.

• A USB hub with enough ports to plug all the devices below.

• 2x USB sticks (one for WinPE and one to store the installation files).

• A wired mouse or one using a USB dongle since the trackpad won’t be working during installation.

• An ethernet adapter to provide internet access to the machine and download the device drivers (including those for the wifi controller and the trackpad).

Installation steps

1. Create a WinPE boot device

From a Windows device,

1. Install Windows Assessment and Deployment Kit (Windows ADK) and Windows PE add-on (official guide, as of June 2024)

2. Launch the "Deployment and Imaging Tools Environment" app with administrator privileges

3. Run the following commands one by one:

   cd "C:\Program Files (x86)\Windows Kits\10\Assessment and Deployment Kit\Windows Preinstallation Environment\arm64"
   copype arm64 C:\WinPE_arm64
   Dism /Mount-Image /ImageFile:"en-us\winpe.wim" /index:1 /MountDir:"C:\WinPE_arm64\mount"
   MakeWinPEMedia /ISO C:\WinPE_arm64 C:\WinPE_arm64.iso
   Dism /Unmount-Image /MountDir:"C:\WinPE_arm64\mount" /commit

The WinPE ISO should now be available at C:\WinPE_arm64.iso.

You can now simply use Rufus to "burn" the ISO file to a USB drive.

2. Create a Windows for ARM 11 24H2 (or newer) ISO file

Note	It appears that only recent versions of Windows on ARM 11 (24H2, as of June 2024), will allow the installation process to work. Make sure to keep that in mind when selecting the revision of Windows in the next steps.

There are many ways to achieve this outcome. If you have access to a macOS device, I’d suggest using the open source CrystalFetch app which will generate an ISO file from official ESD files downloaded from Microsoft servers. Otherwise, simply use a script from UUP dump to generate the ISO file.

3. Retrieve the install.win file from a Windows on ARM installation ISO file

1. Mount the ISO file and locate the install.wim file. For me, that file lived at /sources/install.wim. The file should be quite large (4+GB). If yours is nowhere near as large, you’re probably using the wrong WIM file.

2. Format the other USB drive (not the one used by WinPE) as NTFS.

3. Copy the install.wim file to that newly formatted drive. Anywhere will do but the root will make scripts listed next work out-of-the-box.

4. Create the installation scripts

Original code from Microsoft (1, 2). Those guide were written in 2014 and a couple tweak were necessary to make them work with Windows 11 in 2024.

1. Create a new file called CreatePartitions.txt next to the install.wim with the following content:

   rem == CreatePartitions-UEFI.txt ==
   rem == These commands are used with DiskPart to
   rem    create five partitions
   rem    for a UEFI/GPT-based PC.
   rem    Adjust the partition sizes to fill the drive
   rem    as necessary. ==
   
   select disk 0
   clean
   convert gpt
   
   rem == 1. Windows RE tools partition ===============
   create partition primary size=600
   format quick fs=ntfs label="Windows RE tools"
   assign letter="T"
   set id="de94bba4-06d1-4d40-a16a-bfd50179d6ac"
   gpt attributes=0x8000000000000001
   
   rem == 2. System partition =========================
   create partition efi size=260
   format quick fs=fat32 label="System"
   assign letter="S"
   
   rem == 3. Microsoft Reserved (MSR) partition =======
   create partition msr size=128
   
   rem == 4. Windows partition ========================
   rem ==    a. Create the Windows partition ==========
   create partition primary
   rem ==    b. Create space for the recovery image ===
   shrink minimum=15000
   rem ==    c. Prepare the Windows partition =========
   format quick fs=ntfs label="Windows"
   assign letter="W"
   
   rem === 5. Recovery image partition ================
   create partition primary
   format quick fs=ntfs label="Recovery image"
   assign letter="R"
   set id="de94bba4-06d1-4d40-a16a-bfd50179d6ac"
   gpt attributes=0x8000000000000001
   
   list volume
   exit

2. Create a new file called ApplyImage.bat next to the install.wim with the following content:

   rem These commands copy the selected image file to
   rem predefined hard disk partitions on a UEFI-based computer.
   rem Usage:   ApplyImage WimFileName
   rem Example: ApplyImage E:\Images\ThinImage.wim
   
   rem === Copy the image to the recovery image partition =======================
   copy %1 R:\install.wim
   
   rem === Apply the image to the Windows partition =============================
   dism /Apply-Image /ImageFile:R:\install.wim /Index:1 /ApplyDir:W:\
   
   rem === Copy the Windows RE Tools to the Windows RE Tools partition ==========
   md T:\Recovery\WindowsRE
   copy W:\windows\system32\recovery\winre.wim T:\Recovery\WindowsRE\winre.wim
   
   rem === Copy boot files from the Windows partition to the System partition ===
   bcdboot W:\Windows /s S:
   
   rem === In the System partition, set the location of the WinRE tools =========
   W:\Windows\System32\reagentc /setreimage /path T:\Recovery\WindowsRE /target W:\Windows

5. Setup your device for installation

1. Make sure your Snapdragon X Elite computer is powered off.

2. Plug in all the USB drives, mouse and ethernet adapter to it.

3. Power on the machine and wait until the command prompt window on a plain blue background appears. This means that the WinPE environment has correctly started.

4. Identify the drive letter for the disk containing the install.wim, CreatePartitions.txt and ApplyImage.bat files. You can use the list volume command from diskpart to help here.

5. Run the following commands one at a time (replace D: with the drive letter found previously):

   diskpart /s D:\CreatePartitions.txt
   D:\ApplyImage.bat D:\install.wim

6. If all went successfully, you can power off the machine via shutdown /s

7. Once powered off, unplug all the USB drives (you can keep the mouse and ethernet adapter plugged in).

8. Start your machine, which should boot into the Windows installation flow by itself 🎉

I tried the guide with my Galaxy Book 4 Edge 14' (of which the OS suddenly died and refused to boot) Windows 11 Home 24H2 26100.1742_arm64 (using UUP dump, with updates included) ADK 10.1.26100.1 (May 2024)

I didn't plug in the Ethernet during the installation (using PE), and used USB tethering with my phone after the boot into the newly installed Windows 11. Drivers and Samsung software(not all of them) were installed during the first boot, and I could get some more default Samsung services from Microsoft Store.

So far so good. Thank you for the guide!

I was in a hurry and I couldn't try burning W11 ISO directly using RUFUS. One thing I regret is not backing up the Samsung recovery partition, which might be able to be used later.

Hey, I made an Windows Image Splitter so you can make it work in FAT32, turns out the only issue is your boot drive not being formatted in FAT32. It's not perfect yet but it works. Maybe give it a shot if you plan on reinstalling? (Also, you can use Rufus optimization with this, telemetry question bypass etc)