You may encounter online connection issues under Vista. In that case, you'll need to set the application compatibility mode to "Windows XP 2". This can be done by right-clicking the desktop icon for the game, selecting "Properties" from the context menu, going to the "Compatibility" tab and selecting to run this program in compatibility mode for "Windows XP 2".
Processor: Intel® Pentium® II 1.2 GHz or better
Memory: 512 MB RAM
Hard Disk Space: 820 MB
Video Card: DirectX 9.0 AGP with 32MB or better with HW-T&L
Sound Card: DirectX-compliant
DirectX® Version: DirectX version 9.0b or higher (included)