Hi. My Macbook's CPU has been acting weird. When I open activity monitor. I see the graph just going up and down, very fast and the stuff thats driving it up is System. But for some reason, even with the system CPU usage at 40.5% the Kernel Task is using the most CPU at 1.3% and only 4 other activities are running at .8%-1.1%. This is also causing my fan to always be on because my CPU is always working! Right now my CPU temp is 162 degrees! Pls Help!