I just bought two new athlon computers with 80GB Hard drives and one runs quite like a mouse fan and the other sounds like an old freezer with the constant humming sound. At first I thought it may be the processor, however after removing panel learned that it was infact the HD. I have tried rebooting as well as letting it sit off overnight, however nothing is helping it. It ran quite for the first week and now is has become a nusiance. It sound like what old computers use to sound like. Any comments?