Well i downloaded ac2 from steam and it was working perfectly fine up intill I got to 20% game completion. Now every time I go into the game it just lags really bad I can still play and move around but its really difficult. all my drivers are updated and I have 4 or 5 other games on my computer and they all work fine except ac2. can someone please help me out. im using a windows 7, zt systems with amd a6-3650 apu with Radeon(tm) HD Graphics 2.60GHz, 8.00 GB ram 64 bit operating system