Ah, finally I see someone else mention this update. Was just about to start a new thread. Thanks, fg2001.
I too had a boatload of updates, plus Dell provided a new BIOS version too. Smooth and fast installation of all the Microsoft updates from this end, in spite of the THREE restarts this time around. The cumulative update seemed especially quick, although maybe that was just me, expecting the long list to take longer to install.