Fresh install Win 10 locked up

[Tom 0]

Decided to sell my fairly new Dell 17" laptop.  Using Recovery, I did a clean install of Win 10, including wiping the disk.  After install completed, I was being lazy and letting Cortana lead me through setup (not smart!).  Got to the internet connection; it recognized my router and I entered my password.  Windows started the verifying and connecting process - and locked up.  After hours the dots are still flowing; it is still trying to connect.  The screen is locked; no combination of key or mouse strokes will release or advance or kill the screen.  Shut power down, even for a week.  Unplugged and re-powered the router.  By-passed the router with a direct Ethernet connection.  Still locked!  Still trying to connect.

Any ideas

Please!