Unattended Windows ISO install

# Unpack ISO to d:\iso_unpacked\

# get list of indexes from your ISO and pick one you want to unattend

Get-WindowsImage -ImagePath "d:\iso_unpacked\sources\install.wim"

# Mount wim

mkdir "d:\mount"

# here you must specify index from above commands

Mount-WindowsImage -ImagePath "d:\iso_unpacked\sources\install.wim" -Path "d:\mount" -Index 1

# copy unattent.xml to Panther folder

mkdir "D:\mount\Windows\Panther"

Copy-Item "c:\Users\admin\Documents\unattend.xml" -destination d:\mount\Windows\Panther\unattend.xml

# Save and Dismount

Dismount-WindowsImage -Path "d:\mount" -Save

#Dismount-WindowsImage -Path "d:\mount" -Discard # if problem

# In case you have error unmounting, then you can clean it and start over

dism /cleanup-wim

# convert wim to iso

# prepare directory

mkdir d:\wim_to_iso

# run ADK command line

C:\Windows\system32\cmd.exe /k "C:\Program Files (x86)\Windows Kits\10\Assessment and Deployment Kit\Deployment Tools\DandISetEnv.bat"

# paste there

oscdimg.exe -m -o -u2 -udfver102 -bootdata:2#p0,e,bd:\iso_unpacked\boot\etfsboot.com#pEF,e,bd:\iso_unpacked\efi\microsoft\boot\efisys.bin d:\iso_unpacked d:\wim_to_iso\wim_to_iso.iso