Maybe a slight exaggeration but...
I have a Dell Studio 540 PC and have had it now for about 5 or so years. In recent months I have noticed a whirring noise particularly when looking at video or certain websites with lots of stuff on them. I checked the machine and got ride of much dust as I could. Unfortunately that didnt help and the PC continued to get worse until the point it was whirring most of the time, getting louder with tasks such as a windows update.
It has now got to the point that it whirs pretty much all the time to the point it builds up so much it goes into what can be described as a jet aircraft taking off. Im sure its not good for the machine, but things still seem to work. of course id rather it didnt do this.
Forgive me that im not particularly computer savvy but i checked out the machinery, and it appears that the noise and extreme noise come from both visible fans (I stop one and the other continues with the racket, and vice versa)
Would be grateful for advice and to be pointed towards any tutorials that will help me solve this issue , to go back to a lovely peaceful PC