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This is actually possible. There's Linux tools to extract the WIM files from a Windows installation iso. You have to create the appropriate partition setup (EFI partition with bootloader, NTFS partition with the extracted files), and for configuration of the bootloader I created https://github.com/U1F984/create_bcd/

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Very nice implementation of a BCD creator. And in a language I can read, heh.

The only thing that's missing would be driver reflection. I always wanted to have a magic command to just reflect a driver from WinPE into an already-installed Windows, but that seemed to be handled directly by Windows Setup back when I looked at it.

I think you can do it with DISM nowadays though. So just make a trip through a WinPE on the way to starting for the first time and everything would probably work fine.

I would bet that FOG[1] probably handles all of this reliably already. Anyone wishing for a real devops-style workflow for Windows installation could also look at Glazier[2].

1: https://fogproject.org/ 2: https://github.com/google/glazier

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