I know this is probably the millionth post on this, but I've tried everything and diablo 3 is almost impossible to play for me at the moment. here's my problem, playing the game my character doesn't run, im assuming this is lag but my character is moving at a slow walk instead of a run. on top of that when I go into combat the mobs I encounter port around on me I'll attack in one direction and they appear behind me ect., the slow moving also makes it nearly impossible to catch ranged mobs since I'm playing a barbarian.

does anyone know what kind of lag this is? if so is there any way to fix it? i've tried the driver updates, use a game booster which shuts down all background programs, aside from a new computer (and I can't just go out and buy a new gaming computer) I have no idea how to fix this, any help is appreciated.