I think i blew a hard drive on my older HP desktop. All I did was what I do every week, perform a maintenance defrag. When I got back the computer was dead. It makes a funny rattle sound when it tries to turn on. It says hard disk not found, I tried the recovery disk and it says cables may be loose or format the disk. I tried to format it and it says disk not fixed. I opened the computer and did not find any loose cables. Now I'm down to just my recently purchased Laptop. I like having a backup computer so I think I will buy a new Dell desktop. Just wondering if anyone else experienced this.