Very Loud Laptop Fan?
 

I've been noticing a problem recently with my laptop's fan. It seems like out of nowhere it will whir up really loud and create a somewhat high pitched noise like the fan is running very very high, and then after a few seconds go back to the normal fan speed/sound. It's been happening more and more lately to the point that it sometimes wakes me and my roommates up in the middle of the night because it's so loud. I have a Toshiba Satellite with a Celeron M @ 1.46G.

The only thing I can think of is that my settings are set to really high performance, but this computer is so slow in the first place I need them up there to be able to even do anything.

This happened to my old laptop - turned out that it was clogged up with dog hair. Could anything have got into the fan?

Don't think that could really be possible, there's no animals in my frat house..

Ok so theres no animals, this doesnt mean dirt/dust build up/fluff etc... didnt get in there. Is the fan free of anything...

The fan is a MASSIVE dust magnet.

It will attract dust so much more than you think. Try cleaning it.