My windows xp system freezes during the windows xp screen where there's a scroll bar that keeps on moving, and it'll stop, and totally freezes. I'd have to press the restart button on my case, and it'll keep happening for 5-10 times before the one time that it won't freeze. I tried reinstalling my windows, it didn't help. I don't know what else I can do. Is this a harddrive problem? motherboard problem? please help!