While you can install EveryonePrint on any version of Windows (we've even had fun running EveryonePrint on a Windows 2000 server), and we use Windows 7 and 8 internally for development, demos or labs, for live production use, we only officially support Windows server operating systems. The reason is that if the EveryonePrint server is supposed to handle any real print volume, then the workstation operating system doesn't scale properly.