Sorry to ask the obvious question. It seems you must have tried

noapic

but since you did not specifically say so, I gotta' ask.

Do try to give detailed information as best you can. Even using a forum involves some learning.

Otherwise, google for something like your question.

e.g.-- apic error Knoppix

and if that doesn't work, try other related words. I usually have a terrrible time hitting the right words to get the results I want.