This is not a software problem. It is a hardware issue. I am sending you a link that will show you exactly how to
take out and replace your hard drive. (we may need this later as well for full replacement unfortunately)
But, for now, we are going to get to the hard drive 'only' to make sure it is firmly in place. We are not taking
it apart as shown in instructions. You will use this to open it up, and 'firmly secure' the hard drive. If it is loose,
it usually says cannot detect hard drive. But it could also just be 'jarred'. (we hope that is the case here).
Once you get to the hard drive, make sure the cords/attachments etc. are connected to the hard drive.
Put the hard drive back in, and tighten everything down/put back together. Try to restart laptop.
This is your guide below:
Let me know what happens.
Sometimes this takes awhile. Do not worry about time. I will be with you.