MINIMUM:
OS: Windows XP
Processor: Dual-Core Intel i5 CPU @ 2GHz+
Memory: 4 GB RAM
Graphics: Intel 4xxx Series w/ 512MB VRAM or better
Storage: 1 GB available space
Sound Card: Any on-board chip will work.
RECOMMENDED:
OS: Windows 7
Processor: Intel i7 CPU @ 2.6GHz or higher
Memory: 8 GB RAM
Graphics: nVidia GTX 555 w/ 1GB VRAM or better
Storage: 1 GB available space
Sound Card: Ideally, something with Surround capabilities.