Hello. So i decided to install clean copy of windows 7, before that everything worked fine. After instaling i had problems with ethernet controler but somehow that works ok now. And then i realised my audio is not working. I instaled drivers from my MoBo manufacturer nothing, i instaled chipsed drivers same thing. When i enter windows device menager i can sse Realtek HIgh Definition Audio device under sounds and windows says there is nothing wrong with it. Also audio controler is enabled in bios. And one more thing if i turn my speakers up a little, just after windows loading screen, high frequency sound starts and before windows loading screen you cant hear it.