Big Problem Need Help!

I was software updating my brothers computer and I shut it down because he was going to bed and I turned it back on. It asked me to restart the computer and I did and a black shade saying to restart it came up again... What should I do? I have shut it off and on a zillion times and still the black shade with weird text in the background is still happening. This happened around half an hour ago? Shall I just wait until morning!? I am frekaing out