compter wll not start up it keeps shutting down

[maidmarion]

When i switch my computer on it is configuring updates stages 3 of 3 it gets to 94% complete and shuts its self down .  It has now done this 3 times its just starts up again and goes through the same process. Help needed

[Carbon Dudeoxide]

We need more information. Please look here: http://www.computerhope.com/forum/index.php/topic,33586.html