controlling headphones jack

I have problem with my laptop which is it doest recognize my headphones whenever i plug them in , but sound as in music or games go through both speakers and headphones at the same time . is there any program to stop the speakers manually without stopping the headphone ? and does anyone have a solution for this problem in the first place ? I am using HP Pavilion Sleekbook 15 , windows 8 pro 64-bit .

Question by Ali Kodamy on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.