Hi, Could be registry corruption, since most updates simply look in the regisrty to find out where it was installed, unlike DAZ stuff, which actually searches your PC to find a valid poser4/runtime folder. In which case, de-install then re-install, if you don't properly de-install, then it may leave screwed up registry entries, which will persist into an new install. I had the same problem with "the sims" and XP, it had two lots of registry entries, and I only manually cleaned out one set... later jb