I would back up the runtime folder, uninstall the program and then delete the folder and registry entries. Then perform an install of P6, followed by SR1 and then copy your runtime back in. At the end of the day it's more than likely a very minor thing causing you big problems. A totally fresh and clean installation will confirm that. If you continue to get problems, send your sympons and system spec to Curious Labs who might be able to offer some advice or at the very least log the incident in case others have reported the same issues. Don't just give up, work the problem logically and see where the trail leads. Jody