A user somehow deleted the ability to create new folders from the Windows context menu.
A typical correct context menu:
The user's context menu (in this case, right-clicking an empty spot of her desktop):
Sometime in the past week the Folder entry was lost. The user can still create folders by copying existing ones and renaming, but obviously that is a silly workaround. I know how to make a context menu entry for a normal file, but not for a folder. How is this repaired?