The program running on the pc now need to run under NT.
I cannot buy any PC with an NT operating system anymore so,
I have to buy a new PC without operating system (or if that is better) buy a PC with XP (pro or home?) and co-install NT on it.
I do not know what is best
maybe you have an idea about that?
The software running on NT is production steering software controlling weighing systems, valves, stirrers, mixers and so on