Because it stops on my computer, for about 3 seconds. Then there's a flash on the monitor (the picture stays the same but it's like someone was moving the source for a split sec), then the loading continues. I don't think this is normal, but I haven't noticed any problems with the system. The flash also happened when I had Win98, but I never saw the bar freeze since I disabled it. Anyone have a similar problem or know what I'm taking about?