Why is a scripted install using "Windows 10 Enterprise LTSC" ISO is asking if we want to install "N LTSC" or "LTSC"

Testing a scripted install using "Windows 10 Enterprise LTSC 2021" ISO, it pops up asking "Which windows do you want to install", "N LTSC" or "LTSC". 

My questions is how do we stop that from coming up or how can we automate the selection of one over the other? 

BTW I verified the source media is indeed the correct "LTSC" version and not "N LTSC" (see below)



1 Comment   [ + ] Show comment
  • This new ISO contains both of them, vs the old one.

    There is a command you can use, to mount an ISO and get the the supported Indexes or Windows versions contained with it.

    DISM /Get-WimInfo /WimFile:"D:\sources\install.esd"


    DISM /Get-WimInfo /WimFile:"D:\sources\install.wim"

    Where D: is the virtual DVD ROM unit - Channeler 1 month ago

Answers (1)

Answer Summary:
Posted by: Nico_K 1 month ago
Red Belt

you need to add the corrrect decision in your unattended.xml. Your ImageInstall-part should look like:

              <Value>Windows 10 Enterpise LTSC 2021</Value>

  • Thanks Nick.
    As a follow-up: we have been using this particular scripted install for several months on about 50 laptops without issue. All we did was change the source media to the latest ISO. The new install took over 20 hrs to complete, with everything the same (laptop, NW, etc.) where as it usually takes less than 1 hr.

    Do we need to adjust anything as far as pre-installation tasks? Or anything else you can think of that may be causing this? - THimes13 1 month ago
    • normally you don't need to do. The "new" source media just contains of other images than the ones before so the OS picker (the key /IMAGE/Name) does not work anymore as before (read: it does not find the original OS anymore, likely since it is now called LTSC 2021 instead of LTSB or similar as a few years before), so you need to change it (or add it)
      As soon as the installer cannot get the needed answers from the answer file you are asked. - Nico_K 1 month ago

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