is trying to read the hard drive. Suggests it's not able to. Use a bootable DVD and after booting to it, open the file manager on the DVD and see if you can access the hard drive that way.
I suggest a Knoppix, Ubuntu, or Mint, Linux DVD.
If you don't know how to burn an ISO image to a DVD to expand the image onto the DVD properly (NOT burning the single ISO file onto the DVD), you can pick up one cheaply here. If in doubt about your computer ability, and also for all around general purpose on older computers, I'd advise getting a 32 bit version. If you have windows 8, then would want a 64 bit version for sure.