Round about now, if I were you, I would be hoping/praying my back-up is up
to date.
Sounds very much like a hard disk failure. TRY - booting from a floppy, and
change from
A:/ prompt to C:\ - if it does, try "dir C:\" (no quotes) If you are unable
to read C:\ then
it's almost certain that your hard drive is busted.
Sorry about that, but I guess you probably guess it anyway. Len