I ask you to help with everything at once Dungeon siege2 (Dungeon Siege 2)

So where to start, When you enter the game, FPS is terribly stuck + creepy lags, around the mouse cursor there is some kind of black crap from sagging textures, I think so, then he thinks he thinks about 20 seconds then everything, the computer either dies or the game closes or something else. ... In general, I never played the game. Oh yes, the most important thing is probably Windows 7, Game version 2.20 offered this version, they say, it will not lag terribly, yeah right now. In general, I ask for help