After update, login loop

[Wade Smart]

My assistant was working on the laptop when a update popped up.
She said it was just an update so I said allow .. it was a upgrade.
So my 16.04 went to 17.10. What a mess. Now though the login
screen is stuck in a loop. Doing some research this must have been
somewhat of an issue because I found lots of posts on it. None of those
solutions are working. The first thing they say to do is Ctl+Alt+(F1
or F3) to get into login terminal. That doesnt work at all.

Suggestions?
-- 
Registered Linux User: #480675
Registered Linux Machine: #408606
Linux since June 2005