Sounds like your hard drive died. Viruses, especially Kitro, don't want to kill the host, they want to exploit it. Kitro sends spam to people on your email address list.
Get Ubuntu. Ubuntu is a free Linux distribution. It's easy to use all you have to do is create the CD. You can google a source. Once you make a boot CD, boot your computer. If Ubuntu cannot deal the drive then it is dead of natural causes. Chances are Ubuntu will be able to see your files. Are ther any files that you do not want to loose. You windows viruses will not be able to attack Linux because they do not know how to.