So, what do we do to get Knoppix to start. I am new to Linux operation and don't know what a "smart Boot Manager" is.

As I said, two of my Knoppix disk were professionally made and all the disk work on another test computer. But none of the disk work in this one computer.

If I choose to work in the 'failsafe' mode, the "cannot find knoppix system files" error does not appear, but the video scan frequency is all messed up and you can't read the screen.