When a time critical run is being processed the simplest, most efficient screen saver and best power saving, is accomplished by using no Screen saver and physically turning the screen off. You can check on the progress by turning the screen back on. AXIS can also be affected by other programs that may run in the background. Windows may defragment disks, scan for Viruses, check for email, update web pages, etc. You may want to disable these programs from running while AXIS is calculating.