salam sir mene system me window new ki hai window seven premium lekan awaz nei hai device maneger me check kia hai video controler par yellow mark hai audio driver par koi mark nei hai aur ha audio icon par cross bana hua hai jab headfone ki pin lagao icon say cross ka mark hat jata hai aur head fone me thori thori awaz ati hai meray system me apna speker laga hua us me awaz nei arahi help me head fone utaro to phir mark a jata hai icon par