Your first proiority is to get that drive imaged onto the hard drive of another computer, a usb drive or something. Whether the last digit of the hex code shows mechanical problems or not, that drive has had or is about to have a major crash, either mechanical or software/directory problems. You need to make an image of it using some tool, before another program or O/S finishes it off or before it has further attacks. Check forensic techniques or data recovery for details on how to make the image. If you don't image the drive and the problem gets worse or is aggrevated by an attempt to recover data, you loose it all. If there isn't any thing of value, apply the microsoft solution and reformat and reinstall.

I am on break at work so this is necessarily short.

Dick