You could try opening up the case (assuming it's a desktop pc) and checking the screws holding the HD aren't loose. If it is just a noisy drive you could try fitting little rubber grommets over the screws and between the case and the HD. This may cut down on vibration and thusly noise.

Run a chkdsk. Right-click on your drive,choose properties, tools, error checking and schedule a chkdsk for the next boot.

__________________