Ok. It was working FINE on Vista, but then I changed my PC to Windows 7 - which seems to work fine. However, I try run Empire and it gets jerky, and stutters and eventually just stalls. I uninstalled, re-installed, downloaded all Steam updates but no luck... I'm running serious firepower here, Quad core processors, SLI 9800 Nvidia graphics cards - its all laughably within the performance... and like I said it was fine before I switched to Windows 7... so any ideas on whats wrong, and how to solve?