Very recently the processor load remains at 100%, with no idling. I have a Mac Mini 1.25 GHz running 10.3.9, with 1 GB RAM. I have rebooted and have no applications open. Activity monitor says that the most active process is Finder. Restarting the Finder has no effect. It does seem to have a negative effect on system performance - opning images in PS is slow, and Firefox is jerky with beachballing. I have attached a screenshot of active processes. Any help would be much appreciated. The only recent thing I can think of that I have installed is Doom II and Classic to run it. But neither of these is currently open.