Quote -

Poser will install anywhere & run happily, BUT with UAC switched on the "program files" folder is locked & anything that goes in (if it'll go in at all) will end up locked as well, the first time I tried installing Poser into "program files" with UAC on the main program installed fine but the content installers crashed or went part way through installing then gave an error & quit.

A HA!  I just got that very similar revelation after reading some more of previous threads in combination with all the videos I've been watching.  Need to take a break now, though - all starting to run together.

THANK YOU!