Unmountable_Boot_Volume error

Hi, Saturday nite I shut my Toshiba [Satellite 1805 that's 2 yrs old] laptop down. Sunday morning it wouldn't start. Today, I tried to start it again and FINALLY got to read the blue screen which said Unmountable Boot Volume. I restarted w/f8 and managed to get the computer to get to a:\> and it recognizes the CD drive as Q I can't find the hard drive at all from the prompt It's got Hijack on it but I can't find the hard drive to run it Help from Maine!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Reading the Readme.txt file on the CD says that if I choose Option 2 to Boot from CD, then it will erase the hard disk and I've got some files I don't want to lose.