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!