:4-dontkno My thinkpad will all of a sudden freeze. I can't move the mouse, ctrl-shift-delete or anything. I have to power off. When I try to restart it usually takes several attempts because it freezes during startup. Some days it works fine. I have defragmented, cleaned out spyware, reset the checkpoint. I am not very literate in this stuff so codes and things won't help me. Can anyone tell me why this happens and/or how to fix it? The only other thing i can think of is that the bottom gets very hot. Thank you if you know anything about this.