I finally got around to trying to roll back with the updated utility. I get the same exact error message. This is not a problem because I took another HDD, performed a clean install of 1607, and moved my user profile from the old HDD's windows.old. I am better off because I now have a clean registry, but it took a long time to do this and reinstall programs. I will keep the old HDD intact for a while and retry the rollback if a new version comes out, just to know I have a utility that can do this (windows did not have the option selectable). Eventually I will use the old HDD to back up when I am confident I am running everything perfectly. Thank for your help.