I'm sorry if this has been posted before but when I go into a Game i sometimes become invisible and when i start playing i only see The Hp bars and their names whats going on?

Picture of the problem

http://img511.imageshack.us/img511/7639/rty543e3ml.png

I would guess there was a error when you were downloading the image files..
if i were you i would install it again. (of course without any other programs running) if that doesn`t work i would install a new graphic card.

new graphic card :/ i remember seeing invisible effects because my old computers graphic card was whacko all the sudden