jab men apna pc restart karta hun ya koi audio speaker chnge krta hun to speaker kam nai kartay aur phir nechay volume bar men ja kar
>speaker properties>advanced>default format ko change karta hun aur phir test kar k ok krun to speakerchal jate hain plz solve my problem phlay aisa nai hta tha jab k window 7 ki hai tb ka problem hai .aisa kiun hota hai?????helppppppp