My computer dont make any sound

Hello,
i cant hear anything on my computer idk y i went to volume control but i cant to nothing cuse i can clik it says no audio device i have earphones but i cant hear anything i went to i tunes and it said a problem whit audio configuration i did the system restore cuse i was removing programs i think i removed something idk and its still the same and i cant see the icon volume no more!! plz help ={