Quote Originally Posted by pabro View Post
use the username root and the password is the one that you entered when installing kali...
This is the correct answer in the thread. I have tried every possible thing over past 30 minutes. Finally I tried root for UN and PW created during setup process. Every guide I used had many contradicting info, or incorrect/missed steps resulting ultimately in Linux not being useable. However if you are new to this and have been experiencing as many issues and troubles as I have, then join a forum like this one and start participating. :-)