I have several copies of NOOBS OS on several different microSD cards. After shutting down my Pi, taking out the card and inserting a different one, NOOBS booted to a login screen ( as you see in photo ). I tried user:root and password: raspberry and was told incorrect password. I found another Stack Exchange question about this issue but the answer said to run a command at the terminal. I can't open a terminal from the login screen ( or maybe I don't know how). How can I get into NOOBS and turn off this login functionality?
Most OS's that are made for the Raspberry Pi do not have
root as a valid username to login with (the root account is disabled). Try username
pi with the same password, those are the default login credentials of Raspbian.
Also, NOOBS isn't an OS, it's an installer for a group of OS's. Which specific OS did you install? Raspbian?