15 months earlier i bought Samsung hard-drive"HD 642JJ",640gb . he starts to make annoying noises when Browsing internet ,open game and play game ,copy files and act.... with that the pc getting slow. where i bought it they replace him with a new one . i hooked it up and started installing windows xp sp3,after slow format ,installing the windows no sounds where heard . then the noise starts low and get loud as the first hard drive did.