Hello. I recently installed the Lion 10.7.2 update. Since then my laptop (Macbook Pro Mid 2010 , 15 inch, 2.6Ghz i7, 4GB RAM) has had the fan on constantly, all the time without a second of it not being active. I looked at the temperatures and the CPU is constantly between 80-90 degrees celsius. I check the activity monitor and find that there is no application that is CPU dependant, as this happens even now as I type this post on Chrome, the only application other than Mail that is open. Is there a fault with my machine? This happens even on a flat surface such as a desk. To put it into perspective I could start ripping a DVD via handbrake and the CPU temperatures would stay the same.