The image above reminds me of the same ATM error I encounter 2 years ago, the only difference is the operating system which happens to be IBM’s outdated O/S2. I thought for security purposes, banks prefer UNIX or Linux system.
If banks, ATMs, machines, cars, phones are powered mostly by Windows from Microsoft, then it is almost impossible to break the monopoly of operating system by Microsoft.
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Image source and credits : Shaolin Tiger
Citibank ATMs Run on Microsoft Windows XP
Most bank nowadays uses Diebold ATM machines and they uses Windows based interface to run it since the ATM machine itself is not much of a critical component in a banking system. It is merely a network computer with cash dispenser.