No, need to say you're sorry to me.  It might be worth a shot.  For a brief stint I tried using Windows Vista and had loads of trouble with Poser 6, but since upgrading to Windows 7 no problems at all.  I'm kind of old school and have always installed Poser to the root directory to make it easier to access the Runtime folders.

C:Poser 7.

Maybe someone else with chime in here ...
R-

PS: The problem might be Windows 7 UAC issues.  Program Files and Program Files (86) ARE protected folders ...