Autodesk Content service (Especially 2016) isn’t playing nice in my environment. If you’re in a BIM environment and you’re seeing a lot of strange things happen in Office (think ghost actions 🙂 ) I recommend uninstalling it. You’ll see the same trends in Event Viewer as pictured below.
From admin prompt:
msiexec /x {A37CDB58-AAE8-0000-8C13-E0F7BACB0D5F} /quiet