I knew it. I broke it...
The only thing I did was above step one, what you instructed to do to the desktop. I checked all five boxes, clicked apply, then ok.
I rebooted the computer, got to the password page and entered my password. The blue page with the welcome is circling and the desktop won't open.
I rebooted the computer and I,m stuck in same spot.
I am on my wife's iPad.
Send help and maybe a donut too. Thx.