Hello everyone,i uninstalled the old drivers. when i install new driver it just completes process without installing AMD display driver.i searched in device manger it showed only microsoft basic display adapter.here is a pic of my CCC
https://dl.dropboxusercontent.com/u/41629841/Photos/Sound%20Problem/Driver%201.PNG
https://dl.dropboxusercontent.com/u/41629841/Photos/Sound%20Problem/Driver%201.PNG