OS: Windows® XP SP 3 (32-64 bits) / Windows Vista® (32-64 bits) / Windows 7® (32-64 bits) CPU: (Minimum) AMD Athlon 64 x2 or Intel Pentium D @3.4Ghz (Recommended) AMD Bulldozer or Intel Core i7 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) AMD HD2000 Series or Nvidia 8000 Series (Recommended) AMD HD6000 Series or Nvidia GTX500 Series HDD : 4 GB of free Hard Drive Space