I update my system every day if there are updates. The last update was the one that changed the app center icon. There was also two drivers for intel and nvidia listed in the installed list, but they were not, I install both.
Now the system boots. The log-in screen is there, but when you log-in the display has black areas overtime the display my show the top menu, but it does not work. Them most of the time it kicks the system back to the log-in screen. Not sure but I think it is the drivers, but I do not know how to remove them by hand.