Bought it from steam, so its a digital download. Don't know the version, but i bought it as a bundle yesterday.
My specs:
Windows 7
Processor: Intel® Core2 Duo CPU E8400 @ 3.00GHz (2 CPUs), ~3.0GHz
8gigs of Ram
graphic card: NVIDIA GeForce GTX 295
1tb of memory.
Don't know if you want to know more