Game starting

[Koooo]

My problem is it that when I'll start a game Steam That I press "Play". Then it asks for the launch of the game in safe mode. I have tried to respond "yes" or "no." When I chose either "yes" or "no" my monitor image transform big. That is where it will not go ahead and nothing happens. Its stucks there and dosent go back to normal, its still big. I get it back when I close my small program with Task Manager. What should I do and can not even fix the problem?

Is anybody know nothink? I try to reinstall it but dosent work yet.