When I tried to start Knoppix today, I got the boot screen and I press enter. After it start to do hardware detecting, I got the error message that it could not find the knoppix system and it is putting me in a limited shell. What does all this mean? What can I do with the limited shell? Can I use the limited shell to start Knoppix?

Knoppix worked before without problems. What could be causing the problem? What could be a work around this problem?

Thank you.