Recently, this bizarre window would suddenly appear & then quickly vanish. Looked like a larger version of the command window & across the top it says:
C:\Program Files (86x)\Microsoft Office\root\Office16\officebackgroundtaskhandler.exe
What's this about & how do I stop it? Step by step. Thanks.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic