My macbook pro has this habit of making its fans rev up like jet engines even when im doing HEAVY tasks such as......web browsing. I check CPU usage and its like less than 1% so whats going on whats the deal. I even tried sleeping and re-waking up but as soon as i wake up fans start reving up again. This just started like 47 mins ago by the way but it gets like this once a while. I dont wanna download SMC Fan control in fear that i might mess up settings but im REALLY considering it now.