I'm a total control freak (admittedly) so I NEVER use auto updates for ANYTHING (Windows, Max OS X, Adobe, Roxio, Java, AVG... NOTHING updates automatically on ANY of my eight systems). Microsoft tries to sneak their "Bing" BS into Windows Updates, and I don't want it. Roxio tries to install "Yahoo" or "Ask" toolbars. Mac OS X Update constantly has "iCloud" which I don't use. Even Java pushes the "Ask" toolbar.
Bookmark and use those whenever you get an update prompt. They contain nothing else, and they're FULL installers, so you don't need to download one file and then another.