You should contact Curious Labs about this. If this happened after formatting your drive again, it will probly happen again. Sounds like theres something conflicting with Poser. I have Pro-Pack on Win ME and have only had simular problems do to a virus. My advise is dont re format your whole drive. Thats the very last thing you should have to do. Have you tried uninstalling Poser (restart and make sure no files are in the Poser folder) and then installing again? You can put your runtime somewhere else as back up and move files back after install. This is when it would be nice if they had made it possable to only install program files instead of 600 megabytes of stuff that is allready there.