Sorry no one has got back to you before this, but there was a problem - now fixed - with the link referring to your problem so that nobody could see what you were referring to !
The first time you arrive at this screen, choose 'Start Windows normally'. It may work, it may not. If it doesn't work, then the next time you arrive at this page, choose 'Start Windows in Safe Mode with networking'. If it boots into Safe Mode - you'll recognise it immediately, it has a black screen with your icons spread all over it and the words 'Safe Mode' in each corner - then let it settle and fully boot itself, then shut the computer down and re-start it.
Believe it or not, this simple process often cures the problem and your computer will carry on to run normally. It may not fix it.
If it doesn't, and you come back to this screen, choose 'Last known good configuration' and press 'Enter'. This may take a few minutes, and is a good time to make a tea or a coffee, pour yourself a beer, or merely practice contemplation. This procedure normally works but, again, may not ! this is windows we are dealing with.
If none of the above work, post back here but with details of your computer - operating system, make and model and sso on.