Hi there - My harddrive has been making a loud buzzing sound on and off for a few months now, once in 3-4 weeks, when I turn it on it starts to buzz loudly. Other times it comes on completely normal. I looked behind the hard drive on the fan, and there are clumps of dust on the actual fan. I tried to blow it (gently) and when I turned on the computer again it came on with no noise. What would happen if I sent it to be fixed? would it just be a small job of taking the back off and clearing the dust off the fan or is this fatal to my hard drive and do you think I would either have to buy a new one or pay alot to have it repaired. What i'm really wondering is, will it be a big job to fix? thanks!