Graphic errors ? Please help!

Syops

Hi guys, i really need some help, and I´ve searched a lot but with no luck!

When i enter the game it says: Display doesnt support download game, and i relly cant play the game!
I don´t know how to explain but i think its call lagg ? And i tried changing all the video options but nothing happend!

I use windows vista, if that has something to do with this ?

I really appreciate answers, and sorry for my bad english!

/ Adam

douchebagatron

in the console put gammaramp 0

or it might be gamma_ramp 0
or something along those lines. itll fix your problem

puzl

cl_gammaramp 0

Maxunit

I had the same problem on Win Vista x64 and cl_gammaramp 0 fixed it for me. You should try it.