I'm not aware of any extensions installed by the Poser or Bryce installers. I think your problem is due to another 3rd party extension conflict, or a corrupt system or preference file. I'm assuming you've already run Norton, DiskWarrior or TechTool Pro. Next... Trash your Finder preferences. If you have ATM installed, remove it (there have been reported conflicts with OS9). Is it fixed? No? Continue... If you have Conflict Catcher installed, you will not have access to Extensions Manager. If you don't have Conflict Catcher installed, trash the Extensions Manager Preferences FILE from inside the Extensions Manager Preferences Folder in the System folder. If this makes it so you can get into the Extensions Manager, change your extension set to OS9 ALL to disable all 3rd party extensions and see if the problems go away. If that doesn't help, I suggest downloading the Conflict Catcher Demo (if you don't ahve it already). It is a fully functioning, time limited demo. It will give you enough time to locate any extension conflicts that may be causing this problem. If that doesn't help, "re-bless" your System Folder by booting from your System CD and copying the System file, enabler, boot ROM and Finder from the CD to your System Folder (it's a lot easier than re-installing the System). You'll want to back these files up to another location on your HD before you replace them. Failing that, try the Apple Tech Exchange: http://discuss.info.apple.com/boards/powermac.nsf/by+Topic?Openview or the MacFixit Forums: http://www.macfixit.com/cgi-bin/ultimate/Ultimate.cgi?action=intro Hope this helps.