Assuming the developers had half a clue, they don't. They run Windows XP Embedded which can be stripped back to just the kernel and a serial terminal if necessa

Assuming the developers had half a clue, they don't. They run Windows XP Embedded which can be stripped back to just the kernel and a serial terminal if necessary. It's not like they take a retail XP CDROM and installed it (of course, in the absence of clue this works too...)