if it's a wd 1tb black drive, they have had tons of them sent back. There is a manufacturers defect (in my opinion). No, it hasn't been officially announced, but...when you look at on-line retailers, all of them have these drives available as "refurbished. That seems odd to me, unless there is a big issue with these. And, i had one myself give me issues lately. I fixed it though, by putting it in an external drive. After trying for hours to get it to repair, i finally gave up and deleted the existing partition. I then made a new partition, re-formatted and so far so good. but, I doubt if I will trust it very far. it was only 3 months old. Thankfully, I had a good system back-up to recover from. And yes..i am certain that it was not caused by a virus.