This article lists which WLIDS and EloPOS AiO devices do not include a non-HID touch driver

WLIDS 2.0 15.6" 
WLIDS 2.0 21.5"
EloPOS 15"
EloPOS 17"

The above Windows OS models do not ship with a (non-HID) touch driver built into the image.

If you need to load an Elo touch driver into any of these AiO devices, you will need to load the SW602800, v7.1.1 driver (which can be found HERE). 

Typical use case would be that you need to use Force Mouse for any POS application needs.