Okay, I've installed and re-installed lualatex, using both Miktex and texlive on a Windows 8.1 pro machine more times than I can count in the past two days.

It will typeset correctly once, then it fails.

The same file works fine on a similar machine running Windows 7 Pro.

Please find logs from both sets of runs attached.

I guess I'll try W32TeX next.

William