I've played KOTOR2 seemlessly on computers worse than this one. However, the movement of the character is so erratic for some reason, the game is hardly playable. The character will randomly stop and the movement keys will not do anything, especially when he's targeting something, for some reason he's drawn to targets and has trouble moving while targeting something. As well when he finally does move he runs so fast I don't even see the movement and suddenly I'm stuck at the other side of the room, and he's in this running position and again no longer responds to the movement keys, except for spinning around in a stuck circle. It also doesn't seem to respond when I press B so that he'll walk instead. He also doesn't seem to be able to turn at all, unless I'm in one of those stuck circles, he mostly goes in straight lines, the a and d keys as well as the mouse just turn the camera but the character doesn't actually turn, and even when I have the camera turned where I want to go, he doesn't move with the camera, I'll press W and he'll walk straight in the line he was facing.
Is there just something wrong with the default configuration? I never had this problem before.