Hello, I already did the trick with "gameoverlayrenderer.dll" but game still isn't launching. ( furthermore those settings disappear after computer restart ) [Image: http://img163.imageshack.us/img163/6215/52947649.jpg ] It goes like this. Steam launch itself without any problems. I click to play left4dead2, it shows me loading screen and after about 2 or 3 sec ( and sometimes not even that much ) it goes somewhere and game doesn't start.