FJ290P Buzzing noise and heat.

So for the past few months my 1.5 year old Sony Vaio FJ290P has been making very loud buzzing noises from the left side of the drive. I did a lot of research and came up with it being something to do with the CPU fan. My computer can overheat, but it doesnt turn off. Earlier today I clocked it at 111F with speedfan. Right now while surfing, having itunes open and not active, aim open, its at 90. CPU Usage right now is 47%, but sometimes will go from 8 - 100 in a few minutes. I apparently have 62 processes open, but I have no idea what most of them are, and when I search for them, they all say they are Windows or part of programs I use. I have the performance gage up on my computer and it is always performing well.

But this buzzing does not go away. I went to Best Buy to get my computer cleaned out, the guy said there was a ton of dust. For a few days it was okay, didnt seem to be too loud, just normal. And now it is back to being loud, buzzing, almost worse than before. And I can feel the loud vibrations while Im typing. Its unbearable, and so worrisome.

I am uploading a video of the noise, for you to hear.

Best Buy told me it would be 60 dollars to just give me a guess/diagnosis. And he thinks it has something to do with heating and cooling so about 400 dollars to fix. I do not have time or money to do this. I am in school, and NEED my computer daily. But I do not want it to crash.

Any ideas of exactly what it is? And what needs to be replaced, fixed. I can get people to fix it for me, I just think Best Buy Geek Squad is too expensive and not worth it.

Here is the video: http://tinypic.com/player.php?v=87czy94&s=1

I appreciate any input