I know this is an old post, and that they OP has more than likely got his/her solution, but I came upon this post as I was browsing through for a completely non-related topic, and thought I would post a quick suggestion for anyone who might have this same
problem with any version of Windows.
Shutting down without installing updates is really pretty simple (and half of the readers will probably kick themselves when they see how simple it is). Here are the steps I used to take:
1) Open the start menu and click on Run...
(If you don't see it, right click on the Start menu, and click Properties, then click Customize, and scroll down the link until you find it, check, click OK, click Apply)
2) Type in "cmd" (without the quotes), and hit enter.
(another option is to go through Start - All Programs - Accessories - Command Prompt)
3) Type "shutdown -s -t 00" (again, with out the quotes, and don't forget those spaces, they are important).
That's it.
If you are interested in the nitty gritty details, here they are:
The "shutdown" is the name of the command that gets interpreted by the system as an order to start the shutdown process.
The "-s" is the process that the shutdown command should take, (-s = shutdown, -r = restart, etc...)
The "-t" signifies any delay time in seconds that you wish to apply to the process.
and
The "00" signifies the number of seconds to delay by. Use 00 for instant shutdown, or add a number of seconds if you really want to.
Hope this helps someone who might need it in the future, for any reason.
Also, this is a quick and easy way to get round the metro style of windows 8/8.1 too. Just add a shortcut to the cmd prompt on your desktop or start menu, and your good to go.
Here's a screenshot of the cmd prompt so you can see it:
