Windows 10: Surface Pro 4 Unattended Sysprep Issue

Hi Guys,

Im attempting create an unattended sysprep windows 10 installation (1607) for the Surface Pro 4 using a USB and WinPE. I dont have the current script with me but the process is roughly the following;

Install win 10 - audit mode
Generate an unattend.xml using windows ADK and generating a catalog file
sysprep.exe /generalize /oobe

I then boot into WinPE and capture the ESP and the windows image (c:/)

Now for the problem. Upon booting into WinPE on the target Surface Pro 4 i have a script running that basically preforms the following process:

Diskpart
Select disk 0
Clean
Convert gpt
Create partition efi size=200
Assign letter=s
Format quick fs=FAT32
Create partition msr size=128
Create partition primary
Assign letter=c
Format quick fs=NTFS
Exit

In the script i then apply the images to the correct partitions using dism, and then run these commands based on this resource:
Apply a Windows Image to UEFI-based Computers


bcdedit /set {bootmgr} device partition=s:
bcdedit /set {memdiag} device partition=s:

bcdedit /set {default} device partition=c:
bcdedit /set {default} osdevice partition=c:

Bcdedit /set {FWbootmgr} displayorder {Bootmgr} /addfirst


I have highlighed in blue where the script has a problem. Ignore the black rectangles in the screenshots but as you can
see when the script reaches the point to create the drive letter c i recieve the error Virtual Disk Service Error: The specified drive
letter is not free to be assigned. I believe what is occuring is that we used a faulty usb before this attempt and it has
created hidden drives with an assigned C: letter which is why i can no longer change the drive letter.

How would i wipe out these virtual partitions to free up the letter C?

Edit: ive also noticed there are multiple boot managers in the bios

Regards,
Rab



:)

 

Windows 10 - Cannot read the < ProductKey > in the answer file for unattended installation

Did you use SysPrep to create unattended answer file?

You might need to delete it to proceed to the setup.

 

Creator Update Stuck At 93% -- How Do I Recover

Surface Pro 3

Windows 10 Pro x64 1604

Started an update from 1604 to Creator a day or so ago. Left the machine unattended. Just checked and it is stuck at 93%.

How do I recover?