Windows XP is basically firmware at this point, and has been for over a decade.
Lots of proprietary hardware that works perfectly, will not work on newer versions of Windows due to lack of drivers.
I see it constantly in factory situations with scales, scanners and robot controllers, it would only be worse for million dollar x-ray machines.
This requirement is designed to be hard, and as such is a major red flag to me.
What else is this company going to be difficult with?
Can i only get customer support or cancel my account in person, between 9-4 on the 2nd Friday of the month?
I would consider alternatives, if possible.