[SOLVED] Windows 10 LTSC 2021 installation stuck in a "why did my PC restart" loop

Benedetto Diana 11 Reputation points


EDIT solved by installing the full, licensed version


Hello everyone,

I'm trying to update my Windows 10 LTSB 2016 installation.

To do so I've downloaded the LTSC 2021 evaluation 64bit .iso directly from the Microsoft website.

Unfortunately the installation reaches a point where it's stuck in a "why did my PC restart" loop and despite connecting it to Internet (can't see why ethernet can't be customized, I had to use a notebook hotspot to succeed) as requested by the system, no further progress is being made.

Thought it could be a hardware issue - unlikely if you ask me, since regular, non-LTSC Windows Enterprise seems to install just fine - so I tried installing the LTSC version on a VMware virtual machine but unfortunately the exact same thing happens.

I'm fairly sure the .iso is ok since I checked its hash so I really have no idea what I can do now.

Any help would be appreciated.

Windows 10 Setup
Windows 10 Setup
Windows 10: A Microsoft operating system that runs on personal computers and tablets.Setup: The procedures involved in preparing a software program or application to operate within a computer or mobile device.
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  1. Michael Taylor 50,346 Reputation points

    You cannot upgrade a Windows Server non-evaluation to an evaluation version. It is not supported as discussed here. From Standard you can only upgrade to Standard or Datacenter.

    You mentioned a VM and this is where it is a little confusing. If you are trying to install eval fresh then that should work in a VM. However you cannot upgrade an existing standard edition to eval for the reasons given earlier.

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  2. Benedetto Diana 11 Reputation points

    Thanks @Michael Taylor for you reply.

    I'm trying to upgrade a desktop installation though (Windows 10 Enterprise 2016 LTSB as it was called back then), not a Server one. And keeping files is not a strict requirement, so I can totally go for a clean installation.

    Tried VM just because I wanted to quickly check a totally different environment, unfortunately that failed the exact same way.

    Forgot to add the message appears during the "Just one moment" phase of the installation: system automatically resets and then shows the aforementioned "why did my PC" etc.

  3. Benedetto Diana 11 Reputation points

    My institution was finally able to retrieve the original, full licensed version of Windows 10 Enterprise 2021 LTSC 64bit, I'm happy to confirm the issue present in the evaluation version doesn't show here.

    Apparently I can't mark thread as solved with my own reply so I'll try to edit the first message head

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