Hi,

I'm using Knoppix 5.1.1 and I installed it on my PC harddisk using the root shell by calling (knoppix-installer) command

Here comes my problem in steps:

I went to Shell Root > Typed SU (without any other thing)
Result: > "SU Returned with ERROR"

Now I can't open the Shell Root at all to do my work and whenever I try to open it I get the same error "SU Returned with ERROR" even after restarting. I also can't run applications under Knoppix category in the KMenu.

The question is: How can I recover so I can use the Root Shell?
Or
If I opt to re-install Knoppix can you guide me to a way that allow me to re-install it?