An interesting feature of the PassFab FixUWin (often associated with ISO repacks for easy deployment) is its automated "Smart System Repair" mode

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1. Mount or extract the original ISO image.
2. Modify file tree: add/remove files, replace executables or libraries, change configuration files or registry hives used by the WinPE environment.
3. Rebuild boot records and repack the filesystem into a new ISO ensuring UEFI/BIOS boot compatibility.
4. Optionally sign or rename files to match expected originals so the environment runs seamlessly.

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Technical process (high level)

Elias reached for his custom-built toolkit. He didn't just need the automated repair power of FixUWin; he needed it stripped of all non-essentials. Extraction