Hi @Hexagon37 and All
The update to 36.20 from 36.10 failed Tried verify no success.
Uninstalled FN36.10 and installed 36.20 after
Chkdsk /f /r c:
UEFN will not install correctly from Launcher on any Windows 11 (eleven) version needs to run Elevated "Run As Administrator - General / Issues and Bug Reporting - Epic Developer Community Forums