I may have screwed up. I canceled the update and tried to install the update manually but forgot to restart the machine first. It sat there for an hour or so stuck on "scanning updates" or something similar before I re-read your post and realized I didn't restart. So I canceled the install and attempted to restart. It gave me somthing like "Windows Update is configuring your computer, Do not turn off your computer", for a while, then that changed to "Failure configuring Windows updates, Reverting changes. Do not turn off your computer.", and it's been on that for a few hours now.