or you could just check their website:
Windows XP SP2 / Windows Vista / 7 / 8, 2.2 GHZ Dual Core or better processor, 2 GB or more of total system memory, 512 MB or more of video memory
They DO recommend Win 7 64-bit and (I think it was) 4gigs of RAM. There are little people that run around and do things at that level.
