Ultra Score software works on MS Windows system.
include: Windows XP, Windows Vista, Windows 7, Windows 8, and Windows 10. Both 32 and 64 bit versions.
For the PC which be used by the referee on the court. A laptop is recommended cause it can be easily setup.
For the PC in the control room, you can use both laptop and desktop PC.
If you will going to have a PC running inside the cabinate of the LED screen, an Industrial PC is recommended. It can be controled through another PC on the court through network.