New
#620
I'm not completely sure, but I don't think switching to the slow ring will solve the issue. Neither will Defer Upgrades as I learned much to my chagrin. The Fast/Slow Rings are only for new builds and so is Defer Upgrade.
About the only thing that's gonna save our bacon is to go into BIOS and disable Secure Boot and leave it off until Gabe Aul announces a solution.
That update's been pulled so you can uninstall it and enable Secure Boot without worrying about a recurrence.
KB in question not appearing as an update in build 10568 on my desktop or my friend's. (So far)
Rich
An MS employee at their forum stated it and I can verify that the update is no longer in my WU after being uninstalled.