OS: Windows® XP SP 2 (32-64 bits) / Windows Vista® (32-64 bits) / Windows 7® (32-64 bits) CPU: Pentium D dual-core processor with a clock frequency of 2.0 or better Memory: 1 GB RAM (1 GB on Windows Vista or Windows 7) Video Memory: The NVIDIA GeForce 6800 series, 7800, 8xxx/ATI X1950 or better with Shader Model 3; HDD: 9 GB of free Hard Drive Space