noise in my macbook pro

[saeed]

i hear some noise in my macbook pro and i dont know the reason.
i tried everything to fix such as reseting SMC but it didnt fix.
I dont really know the reason. Is it because i upgraded my mac os x from 10.5.8 to 10.6.3 and should i format my computer?
the noise is not that much however when i compare it to other mac it seems that something is wrong.
the noise is from the fan beside the mouse pad.
please help me to solve this problem

 

[apple.gr]

Do a back up because it's highly likely that the hard drive is strarting to fail!

Also chack the fan speed. it must be in normal ranges.

 

[saeed]

:O how can i fix this problem???should i format my computer ???
why does this happen???
the rpm range is 2000 however sometimes the temp is getting soooo hot(around 70) specially when im using messengers and i use web came
i tried macbook hard ware test...and it said that there is no problem!!!
i bought my laptop around 6 months ago!!!

 

[saeed]

why no one is repling???