Try this. Uninstall poser but rename your runtime directory to runtime2 before you do(so you don't have to reload all your products again) delete the plugins, pref, dots, temp, ui from runtime2 directory. Reinstall fully but do not restart your pc. Immediately install either Service release 1 or 2. I do not recommend SR 3 because it messed up my poser 5 install (and don't hold your breath on tech support ... I never heard back from them from the post I made in DECEMBER.) Restart your computer and run poser. It should ask for your product serial number. If you don't have SR1 or 2, email me. This got my poser 5 up and running again.