I Install windows 7 in my pc but while surfing voice chat sound problem occer

Hi IQBALCCNA, Please be more specific about this voice chat sound issue: 1. Is the issue that the sound cannot be heard while chatting? 2. Which software are you using to chat? 3. Does the issue occur in all chat applications? 4. Does the issue occur while using other microphone? 5. When did the issue first occur? Did it occur after installing some software or changing some hardware?