well i dont have yet the full version of demigod. my laptop's name: HP pavilion DV4 and my OS: W7 i have a little bit space on my hard-drive almost 56%. Actually, i was playing the demigod demo it runs smoothly, and sometimes it's getting a little bit freeze/LAG on my game.. 
i have 2 games installed on my system. (1) assassins creed 2 (2) and 9dragons.
i already have 33 movies n almost 250+ audio music.
and also i did installed some 7+ Applications.
btw i forgot and some of systems application needs updated. this UPDATE is separate from the application the one I installed.
thanks for the advice. plz need further help.. i want really badly this game. within 3 weeks i'll try to manage to bought this game at the "www.demigodthegame.com/purchase". because i was saving the money for this game...
thx.