Last year I bought for my mother a new computer, she is quite computer literate but I was shocked to find 3 months after purchasing that she has gotten into the habit of turning it on once a week just to give it an hour to "update itself". That was to allow her to spend 30mins every other week doing her online stuff..
I literally couldn't or didn't believe it, but then I actually was there one day and watched as all the mostly default installed apps when through their motions of requesting updates. It literally took about half an hour before to computer was usable without something prompting "Do you want to install this update..."!
In the end I removed some of the crap like Java and the HP printer updater, and told her to turn it on only ever other week for the updates!
Definitely there is some need to consolidate updates into one program..