OS: Windows® XP SP 3 (32-64 bits) / Windows Vista® (32-64 bits) / Windows 7® (32-64 bits) CPU: (Minimum) 2.0 GHz single core (Recommended) 2.0 GHz dual core Memory: (Minimum) 2 GB RAM (Windows XP) / 2 GB (Windows Vista and Windows 7) (Recommended) 4 GB for Windows ® XP, 4 GB for Vista / Windows ® 7 Video Memory: (Minimum) 1 GB Dedicated Graphics Card with Shader Model 3.0 (Recommended) 2 GB Dedicated Graphics Card with Shader Model 3.0 HDD : 2 GB of free Hard Drive Space