I turned it on n off several times.. it just goes black.. thanks tho

I have no navigation at all
I can do nothing
It's not the password it's just stuck

Control Alt Delete does nothing at all.
Thanks for your response..

Thank you but the password is correct.. that's not the problem..

Help
I started the windows 10 upgrade
Its at the part when it wants my password but every time I put it in & click next it acts like its loading but then does nothing..
I cannot access my...