How to prevent "It looks like you started an upgrade..." prompt on non-clean drives?

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DAT

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Hi everyone,

I recently customized a Windows 11 ISO using NTLite.

  • On a clean/blank drive: The installation goes flawlessly with no prompts.
  • On a drive with an existing Windows OS: I get the setup prompt shown in the attached screenshot ("It looks like you started an upgrade and booted from installation media...").
Since I am trying to make this install as unattended and automated as possible, this pop-up blocks the process. I have two questions for the community:

  1. What is the best way to bypass or prevent this message from appearing when booting from the installation media on a drive that already has Windows installed?
  2. Is there a specific setting or component in NTLite that I might have removed (or should configure) to avoid this behavior, without breaking other essential features?

    1783978972370.jpeg
Thank you in advance for your help!
 
You can try using the option to run legacy Setup, it doesn't care about leftover folders (except for C:\Windows).

Settings -> System -> Boot/Setup - Legacy
 
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