Hi. >From time to time my computer gets "really LOCKED" while running xlock. I mean it doesn't respond to anything, not even to Ctrl-Alt-Del. What could it be ? It is RedHat4.0 / 2.0.18 / xlockmore-3.9 PPro200 / 64M EDO / IDE disk / 3COM 590 Net.card I would appreciate your help. Boris.