well remember, this is my friend's hard drive. he doesn't really know what is wrong with it. he thinks it may have gotten over heated. He wad told by friend/techie (maybe??) that the computer wasn't getting enough airflow, but i am not sure about this because i don't know his friend and how skilled he is. And overall, I have never seen my friend's computer and what state the hard drive was in during the time it was in the computer.