Solution One
1. Open 360 security guards in the computer, then find the "Computer Aid" button in the interface to enter
2. Then in the Aid dialog box we enter "computer switch machine does not sound" then click on the search, then there will be a repair function below, such as we click on "Fix Now" after a while to repair the good we restart the computer is there a sound?
Solution Two if not resolved we can try the following methods
1. In the lower left corner of the computer, click the "Control Panel" button below "Start" and click Enter.
2. Then in the System "Control Panel" We can modify the display mode without modification, as I modify it to "large icon".
3. Then in the control Panel to find the "sound" button, as shown in the picture click to enter.
4. Into the "Voice" dialog box, we click on the sound Below "program events" under the "Windows Landing" here can be set to boot or shutdown sound, we click the "Browse" button.
5. Then you can set the "sound file", "System defaults" as long as the file can not be WAV format.