1. I think i figured out that the problem is that my graphics card is too old so it doesnt support shaders.
2.Downloadable Low end.
The easiest fix would probably to make a whole new version without shaders or somehow disable them at the start and have an option to enable them.
Also make it so that the enemies that are killed dont draw their weapon when they are not a corpse because i just end up shooting at the dead. (I also played it on my laptop whre it run horribly but i got out some gameplay at somewhere around 5 fps... Yes Low end.)