I have this "login-failed" problem sometimes after installing knoppix 5.1.1 to hdc1 from live CD with "sudo knoppix-installer" command in a root shell.

After installing and rebooting and then doing a "sudo apt-get update" from a root shell, and then doing a "sudo apt-get install iceweasel" from a root shell, and then rebooting, I get a login screen that offers me two different login names and asks for a pass word for each login name. One is "Knoppix User" and the other is "knoppix". But I have not previously set any password or set any user names. How do I login to this screen?

Thanks

US