Ok, the way I would do this if I were the tech working on this is to buy a hard drive USB kit that turns your hard drive into a USB drive.

This would require another PC (like maybe a laptop) to work on as you cant use the pc you have because the C:\ drive is dead.

Get a kit like this one:
http://www.officedepot.com/a/products/151265/Tripp-Lite-USB-20-to-SATA/

Then plug the drive into the other computer and if it can be read, it will show up just like any other USB drive.\

If it dosnt show up, then your hard drive is DEAD, as in hardware dead. The only option then would usually be a recovery service that takes the platters out in a clean room enviornment and re assembles them in another drive that the mechanicals are working in. Then they recover any data you request to be recovered.

A company like the one below would perform such a service:
http://www.salvagedata.com/hard-drive-recovery/

You will have to contact them to figure out the price. It was about $280.00 for the last one I did for where I work, and that was about 3-4 years ago.

Roman