In this case no I am not using the main runtime.  I do have some of the standard poser content in the main runtime, but I have external runtimes on an extra drive.  The previews don't show up for many many of those files.  This one in particular is simply C/runtime/libraries/pose that I just saved to and the thumbnail isn't showing up.  

I do believe I have UAC turned off.

This is probably a dumb question, but what is a file manager?  I do not have one of those.  Can I just edit the folder options inside windows 7?

I am:  aka Velocity3d