"error, only one processor found' ???? You probably have an old network type motherboard like a netvista. I have knoppix running on several machines and this is the only one that does that and it is / was a netvista from ibm.

Just ignore that error, it should run fine other wise.

Your other problem.. I too am a newbie.

Post your video card type and etc. Many times it is a unsupported video card or, in the case of my 350 machine, the monitor is some really off brand that linux doesn't like. I just found one that it ran okay as and to heck with it.