Loud Whirring noise from laptop
my computer has started making loud a loud whirring noise. i know enough to realize that this is the computers internal fan cooling the system. but its never been this constant, or loud. the bottom of the computer isn't even that hot in comparison to normal temperature.
the computer is a thinkpad T61 with windows 32-bit vista, i got it in 2008.
any input on this would be appreciated.