Hey..I recently encountered a problem with my laptop.  From time to time, when I run a game, or just open internet explorer, what I think is a fan will run non-stop and it's really loud.  I've never had this problem before, and I'm not sure if it's a problem or what.  I also am not sure how to fix it.  I tried de-fragging and that did not help.  Also I've done several hard boots and it will go away, but come back again soon after.  Any ideas on how to fix this and to whether it's a serious problem would be greatly appreciated.