The official website for The Settlers of Catan

Question about Technical Questions Does the program also run on Windows 2000 or ME?

Answer

Catan – Cities & Knights was developed and tested on Windows Vista and XP systems. Therefore, we cannot guarantee proper functioning of the program in other versions of Windows. There is some possibility that Catan – Cities & Knights will also run smoothly on an older system if Java 1.6 or higher is available for it. In this case, you should try to run the free demo version on the system. In principle, however, we do not provide support for Windows versions other than Vista and XP.