i) Graphics card and OpenGL.

Try running Poser after Start->Run-> net stop usxms
It disables Aero so OpenGL might work better.
We need details on your graphics card BTW.

ii) Did you INSTALL P7 in admin mode? To get registry settings correct, installing with an admin account is always recomended.

In This Twilight- My FIRST public poser work in 2 years!
Also the reason why I endorse postwork (:D)