I have a few servers that seem to be choking on the KB833407 Critical Update. This is the one that “remove[s] unacceptable symbols from the Bookshelf Symbol 7 font.” I question the criticality of this update, but as I said, server of my systems are having trouble installing it.
I finally did a little research and found this helpful list of troubleshooting steps. I’ve tried the first tip, but I’ll have to wait to retry the installation (can’t reboot servers in the middle of the day, and I seem to recall this update requiring one).
Well, the first part of suggestion one, renaming c:\windows\system32\CatRoot2\edb.log, didn’t solve it. So I renamed the whole folder. We’ll see if that helps.