I have a constant clicking noise
 

I have a constant clickig noise in the background when my computer is on
it is like someone pageing through web pages. It drives me nuts , what could the promblem be?

logail,

It could be several things. Does the noise come from your speakers or from the computer? Fans can cause a clicking noise if something like a cable is touching the fan blades. A visual check or stopping the fan by gently pressing your finger on the centre of the fan should tell you if that is the problem. Hard drives can make a clicking noise but in my experience when they do they are unlikely to boot.