I installed some recommended updates today and now when I get to the login screen I cannot login on my account or the guest account. When I try, it takes me to black screen and then returns to the login screen. I can login on the command line in the terminal. .Xauthority has the correct ownership. Any ideas as to what is going wrong? When it is booting, I get a message saying that it is booting in an insecure environment, I think this is because it asked me to turn "secure boot" off, which I did, but it hasn't prompted me to re-enter the secure booy password.
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