The first three results were sketchy forums offering "oscdimg.exe" wrapped in ZIP files from 2015. The fourth was a Microsoft Docs page. He clicked it.
"Oscdimg is a command-line tool for creating an image file of a custom 32-bit or 64-bit version of Windows Preinstallation Environment (Windows PE)." oscdimg download windows 10
The window filled with scrolling text: "Scanning source tree... 100% complete." Then: "Creating ISO... 100% complete." The first three results were sketchy forums offering