Hi, I have P7 running under Vista Ultimate 32 bit, and it runs fine. On a few occasions where there was a quick crash, the culprit was always the video drivers to blame and Vista rolling back the driver to an earlier 'buggy' version without asking. I have an nVidia 8500 GT and the lastest drivers for Vista are Microsoft certified and work well with Poser. I hopt this helps in some way.

Regards...