Extreme lag on opening screen/menu/game

[Ryze]

ok so after fiddling around a bit i can get the game to actually go (very slowly) through the first sequence up until you can actually move Daniel around..however, the game is still extremely sticky even though my system requirments are far beyond minimum req.

is it just where i downloaded it? others are saying that downloading a pre patch version then updating it works just fine..links maybe?