SCOTs in charge
I used to repair equipment like this... Its amazing what these retailers expect from 10+ year old equipment. But then again, the 10+ year old equipment often has far less software problems than the current generation stuff. One local to my area retailer was among the first to deploy a new generation of self checkout machines. It went so badly that it forced the vendor to re-engineer an alternate version of the previous generation that used the newer PC hardware.
Some machines literally had stickers on internal components that said "Pre-Production", but this hardware was used in full production environments. What can go wrong with that?
BTW, the SCOT in SCOTAppU.exe stands for Self Check Out Terminal.