Oh, I see
Then several suggestions:
1) Can you read the drive on the other PC? If so, may you back it up or image the drive using any backup software like
True Image? It would be great because it means that your drive has no any physical damage.
2) As for you computer exactly, it seems something is wrong in partition table. You may try to recover your drive using drive utilities like Partition Doctor or Disk Director. They will allow you to view your partition if the drive isn't damage by itself. But this work needs great care: don't agree to format the drive and try to read it only first of all. The best way is to have a reserve backup copy if you can create it.
By the way, if you are able to create the exact image of your drive and you are not able to recover the partition using disk tools for some reasons, you may just restore your drive from the image using the same True Image.