REF: TOSHIBA SATELLITE PRO

The fan has started to be quite noisy and I am concerned that this may be 
the beginning of a breakdown. I have had the computer for about 1.5 years 
and its average use each day has beed less than an 2 hours.  How likely is 
it that it is malfunctioning?  Is there anything I can do in terms of 
opening the computer and checking to see if the fan has anything stuck to 
it? Any advice appreciated.