There are several aspects to this problem: 1. There may be a problem with the microphone and you need to try changing the microphone. 2. There may be a sound card setting problem, which can be solved by setting the system sound card. 3. There may be a problem with the sound card driver. You need to go to the motherboard’s official website to download the driver. 4. It may be a software problem (QQ or Sina UC). 5. It may be a system compatibility issue, which needs to be solved by installing a pure version of xp system