The less costly noise was a scrap of paper had found its way to the fan. Another loud spinning noise was a failing hard drive. That cost only a bit more.
My 2010 Mac Book Pro is making an extremely loud spinning type noise. Its almost like when you can hear the lawn mower in your neighbors yard. I can hear the fan when its on and it sounds normal. But when this sound is on the computer also drastically slows down. If anyone has any ideas please let me know. I am a student and live on my laptop. Thanks!