The problem is that I may walk into the room with my computer at 4am because I can't sleep, or some other time, and I can HEAR the computer being active. I would guess that there's a system program - perhaps the index maker - running at that time. Poser doesn't just 'start to run'. That's something I have never heard nor seen. How long does the computer then 'run'? If you can actually hear it, there has to be hard disk activity involved?