The configuration could not be loaded

Hi experts,
Today I used Ubuntu on my PC but it didn’t work well. I was utilizing my hard disk on a fresh system, so possibly the drivers were not completed or something. Well, while getting this error, I made a decision to create a latest user, and then I want to see if the error messages are there. However when I switched users as well as groups it provided me an error message saying: The configuration could not be loaded an unknown error occurred.

Thanks a lot.
