Easy to solve the problem of Windows7 sound card driver incomplete

When installing Windows7 system, many users will encounter the problem that the system has no sound. The speaker icon in the lower right corner of the taskbar is normal, and clicking is normal, but there is no sound. No sound, no matter how good the drama can't come out, how to solve such problems?
The first step, you can carry out a simple check. For example, if the audio power supply and connection are normal, whether the front or rear interface of the chassis is normal. If everything is ok, then you can proceed to the next step.
Step 2, open “Device Manager", view the "sound, video and game controller" directory. Usually, you will find that the device is not displaying properly, Realtek High Definition Audio is normal, but the ATI HDMI Audio column is marked with a yellow exclamation mark.
The third step, open the driver wizard, it is recommended to download the latest driver wizard 2011 Beta 2. View the “Multimedia Devices” under “Driver Updates”, the list of drivers that can be updated is available in the interface, Realtek HDMI Audio Driver 2.55 Edition; Realtek Realtek HD Audio Audio Driver 2.57.
The fourth step is to download and install the new driver provided by the driver wizard. After restarting the system, all problems will be solved.
The above problem occurs because the default driver provided by Windows 7 after identifying the sound card is not complete, and the HDMI part is missing. In case of such problems, just use the driver wizard to detect and install the complete sound card driver!