Most Macintosh freeze-ups, crashes and other failures are easily found. Broken software, a bad drive or some other troubled peripheral problem can be solved with some simple detective work. But then there's that random, inexplicable problem that is never easily solved - a system that freezes when the computer is idle. Momentary lockups. The beachball that never goes away. Oddly-colored pixels that randomly appear or normal ones that inexplicably disappear. Even a random restart for no reason resulting in a loss of any unsaved work.