A while back, Microsoft said that it would remove the “temporary blocking mechanism,” which allowed users to opt-out of installing Windows XP Service Pack 2, on April 12th. From what was lead to believe by what I read, I assumed there would be no stopping the installation of SP2 besides turning automatic updates off entirely. I keep the updates on ( in fact, I received a minor patch today) and don’t keep any updates blocked. I have no received any mention of the updater attempting to download or install SP2.
So what happened April 12th?
P.S. I would try to see if it forced me to when installing updates using their online Windows Update, but it appears to be broken (in IE).