There is a good chance that you have the wrong update file loaded onto your drive. When you are on Sony's website the first one you come to is not the right file (It's for the most current UPDATE...you need the entire system software)...the file you need is located near the bottom of the page. When you get close to the bottom of the page you'll see this: "Perform a New Installation of the System Software"
That's the file that you need. Just be sure to reformat your drive and follow the rest of the instructions to a T.
I hope this helps. Post back here if you still need more help.
Good luck!