So, I have a lot of bugs, when I start a game. It solved really simple - I used intel graphic card and game work normal. But when I make again nvidia card at main, game run with bugs.

Is there anyway to fix that?

You may have to run the game with the config and main startup file added to Windows DEP settings, also have it installed in a root directory.

Put a how to in another thread already so to save typing it out again have a look here :

http://www.gog.com/forum/shadow_man/most_of_the_game_is_invisible_graphical_error

Yes, I saw that topic and it not help.