Windows 10: Win 10 does not recognize login password -- freezes up

Microsoft suggested that I download Win 10 and like a credulous fool I took them up on it. It took more than 24 hours while it "worked in the background" to install but finally this morning it said it was complete and ready.
The new Win 10 login page says, "Hi there! Welcome back!" It shows my username and there is a login window with a blinking cursor and an eye symbol. There is a "Next" button and a small "I'm not (username)" also on the page.
When I enter my password and hit "enter" nothing happens. If I click on any of the other items on the page nothing happens. I have done several hard reboots and tried again -- nothing happens.
I would like to try Win 10 to see if it is indeed the land of happiness, but I'm also willing to uninstall it and reinstall my familiar, old Win 7 until 10 is more, ahem, mature.
Is there a path out of this impasse?
Could it be that my Dell Optiplex is pissed at me for dumping Win 7 and will remain unresponsive and sullen until I return to it?

:)

 

Login hangs after entering password

Repro:

• Boot up Win 10 after latest update
• Enter correct password for Microsoft account
• Attempt to login

Result : Login freezes and I am not able to log in.

Hard boot is required.

 

Safe Mode log in

I went into safe mode on my win 10 PC and when booting up it asks for a password. In normal mode login asks for a PIN. In Safe Mode login asks for a password. The normal mode PIN does not work for login to password request. Now I can't log into my
PC or get out of safe mode. Help