I have..

Windows Vista SP1 Home Premium

AMD Athlon(tm) 64 X2 Dual Core Processor 5400+ (2CPU's) ~2.8GHZ

4GB Ram

Nvidia GeForce GT 520 (2.7GB VRAM)

DirectX10

250 GB HDD/452GB.

Recommended

OS: Windows 7

Processor: Core2Duo 2.66 GHz

Memory: 4 GB RAM

Graphics: GeForce 9600 (1GB)

DirectX®: DirectX 9.0C

Hard Drive: 7 GB available hard drive space

Is there a demo, where I can try seeing if I can run it?