Installed Catalina and it has stopped responding with a screen saying “Setting up your Mac” and at bottom of the white background it says setting up with circular bars spinning as if it is still thinking. It has been like this for

Installed Catalina on MacBook Pro and now on the screen shows “Setting up your Mac” and at bottom of the white background says Setting up... with a spinning circular bars indicating it is still in process of setting up. It has been like this for over 5 hours. Can I do anything about this? Is the computer locked up and if so how do I rectify the situation?