Hi, Boggins,
I suspect that he got macro virus to get this pop up. There is no cure except to restore the defaults. It may be because of third party program hiding in his microsoft office program. It is in some of the shared file i had this add on injecting something during startup. So, when he clicks , instead of opening the ms word as target, it goes to that folder and execute the third party program. First he has to go to the Word options menu, and then click on add ons in the left side of the menu. Word options are available if your click the main word icon at the top left. Then he has to check the com in the lower end of the page. He has to check any com undesirable is running. If so, he could just disable. Then in the dropdown menu near com, he has to select add on to see the add on running. If a third party add on is running, he could well disable it from running.
Then he has to go the startup folder, lin the all programs list and check whether any startup item is there in word. He should delete those things.
My fix is simple in that instead of deciphering the what not in the pop up , he could as well restore the ms word to default, which will give him immediate solution.
Macro viruses are worst kind, that it is hiding in the ms folder , i thing, microsoft office shared folder and doing mischievous things.
He could also check whether any macro is directly shown, in clicking this macro tab.Normally macros will not be shown for these kind of macros and it will he hidden in the default settings. Let me see if any other solution is there. If the language of the word is changed by third party, there is setting to restore to English in regional settings menu.
But this alert seems to be a macro virus.