Windows 10: Windows 10 getting stuck on Welcome screen during logon after a lock

I have a new computer that I just installed Windows 10 Pro on. (It's still not activated though.) It has all the latest updates.
So once in awhile when I try to log in after the box was locked (WinKey+L sequence), it gets stuck on this screen (just took the picture):






I saw this happen already twice. The first time it happened, I let it spin like that the whole night. Then in the morning, I tried Ctrl+Alt+Del, or quickly pressing the power button. The message changed to "shutting down" but that was it.
So eventually I had to press and hold the power button for about 5 seconds to kill the power to the box. That rebooted it...
Does anyone know why does it get stuck like this? And if it does it again, is there a way to "un-stuck" it without killing the power?
PS. This is a local desktop. It has a single local Windows account that is an administrator. The Windows account has a password, but is set up for autologon during boot. I installed this Windows 10 literally two weeks ago. So it's almost mint-fresh with the stock setup.

:)

 

Windows 10 Lock on Sleep

I have recently upgraded to Windows 10 from 8.1. After setting up from desktop right click and personalize the lock screen to lock screen after 10 minutes then gone into screen saver and make it 10 minutes with the "on resume, display logon screen" box
clicked.

I am unable to get the computer to lock after non-use.

Please advise.

Thanks

k

 

cannot get past the logon screen

I went thru all those steps. When I logged in in Safe Mode, it did the same thing - desktop flash for a second then back to Safe Mode Logon screen.

I did a Restart (regular), with the same result.

After the first logon attempt in regular mode, a Welcome screen shows with:

Upper left corner - "Welcome to Windows 10"

Upper right - "Like what yo see?"

Center - "Discover what Windows 10 can do for you"

clicking on this screen brings of the logon screen. After entering password, desktop and some window appears for a second, the back to the Welcome screen.