Here are the instructions to make the annoying update notifications to go away:
How to make update notification go away?
I was lucky. I had rooted just a little while before I first received the notification to update. Not knowing any better, I tried to update, but it failed. Then I came to this forum to find out what to do and found out the probable reason it failed was because I had already removed some of the stupid bloatware that came with the standard installation. I also found out that I am better off not updating.