I have received the message "Hard-disk drive failure - Strike the F1 key to continue". This has occurred twice - 12/26/14 and about exactly a month ago. Happens during the night when I'm not on computer. I powered machine down and restarted. Had no other problems between the two failure messages. I purchased the Dell Inspiron 660 June 2013. Does my hard drive need replaced already? Or is this occurring because some automatic system check triggers the error?