I updated on both my laptop and desktop. Desktop had no problem apart from an issue with the Dock, but the laptop had screen lock set, and I could not access the PC during the upgrade as it gave me authentication error. When the activity light stopped, I rebooted, hoping that it had all gone well and would restart, but now I keep getting a message that says:
Oh! No! Something has gone wrong. A problem has occurred and the system cannot recover. Please contact a system administrator. I have tried rebooting holding down the F8, F12 keys and there was no change in the error message. Have I bricked it?