OS: Windows® XP SP 3 (32-64 bits) / Windows Vista® (32-64 bits) / Windows 7® (32-64 bits) CPU: (Minimum) Dual Core CPU (Recommended) Quad Core CPU 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) Quad Core CPU (Recommended) GeForce GTX460 1Gb or compartible HDD : 4 GB of free Hard Drive Space