OK, good news, I think. After trying several times with system restore, I FINALLY was able to restore my computer to an earlier time, right before the SECOND Windows update. I bring up Word, and now I CAN do a save.
With respect to your post, I discovered something: apparently I didn't need to do a system restore. Maybe all I needed to do was look at the "Review your update history" screen, and uninstall the latest ones?
I also have turned off automatic updates.
Thanks.
Now it's time to fire off a letter to our buddies at MSFT, as in:
Dear Bill,
WTF?
Sincerely,
Rudy45