Why can’t I use QQ or Skype for video and voice chat on my Acer laptop?

Acer notebook QQ, Skype cannot perform video voice solution:

Acer 4560G-6344G64Mnkk

1. Install the KB888111 patch (winxp sp3 does not need to be installed).

2. Install Conexant Sound Driver V3.54.

3. Open Control Panel-Sounds and Audio Devices-Audio-Recording-Volume-Options-check Advanced Control-Open Advanced Control-Other Controls-check Microphone Enhancement.