The no-prompt efisys + media-first boot order reboot-loops: every post-copy reboot
re-boots the media before the disk install completes, so it never finishes (symptom:
"no bootable device" after ejecting). Standard efisys.bin (press-any-key) lets reboots
fall through to the installed disk. Legacy-Setup boot.wim patch + /unattend retained
(the real fix). Documented VM-verified result + the residual one-click WinPE language
page in iso-builder.md.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
VM test proved Win11 24H2 redesigned "ConX" Setup ignores the windowsPE pass of
autounattend.xml (manual language/keyboard/region prompts). Deep-research-verified
fix: patch sources\boot.wim index 2 to launch the legacy installer.
build.ps1 stage 2b: mount boot.wim idx2, load offline SYSTEM hive, set
HKLM\SYSTEM\Setup\CmdLine=X:\sources\setup.exe, unload, commit. Also place
autounattend.xml in \sources as well as ISO root. Legacy engine consumes all
four passes -> fully hands-off. Documented in iso-builder.md §3a (incl. rejected
winpeshl.ini / RunSynchronous alternatives + ConX-may-change caveat).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>