Lately, my mid-2010 15" Macbook Pro's fan has been a little loud, but I have no reason why. Here's what I've done so far: 1) I installed smcFanControl. On average, my computer runs at around 50 C. Fan speeds average around 2000 RPM. At this speed, I can still hear the fan pretty well. 2) I checked my printer queue. Completely empty. 3) I also checked my Activity Monitor after shutting down all my programs. Nothing over 1% CPU usage ever comes up. 4) Popped open my MBP to check out the fan. No visible layers or clods of dust on the fans. The computer isn't that old. I do spend a lot of time on the computer, so that may be it, but the fans never run that fast unless I'm ripping DVDs or transferring data. What could it be?