It will help lots of people to know what worked for you :-) (and if it doesn't work, perhaps we can edit our answers if you still want help getting the install done) That part should go easily.
This will show you how to enable or disable the Install Updates and Shut Down shield on the Start Menu "Shut Down" power button and option in the ALT F4 Shut Down Windows dialog box for users in Windows 7 when important or critical Windows Updates are available for installation.
You must be logged in as an administrator to be able to do the steps in this tutorial.
A second method top stop Windows automatically restarting is just to modify your Windows Update settings so that it will only download updates, but not install them until you tell it too (Start - then select from the drop down menu, “Download Updates, but Let Me Choose When to Install Them”).
These two solutions are going to work best for people with “Home” or “Home Premium” versions of Windows.
They walked me through the steps to reinstall OS X which will take several hours.
Fortunately I have a time machine back-up that I can use once complete I had this error as well.
Sure, they have a “postpone” button that pops up, but that does little good if you happen to step away from your computer when it pops up to inform you it’s about to restart.
Many a time I’ve been working on some article or piece of software and I take a break to go get a snack, only to come back and see my computer has automatically restarted, losing a portion, or sometimes all of my work.
You should know how to prevent Windows Update from automatically restarting your computer.