The reason why the Win7 system automatically becomes silent mode and the solution

Win7 system automatically becomes the silent mode and the solution:
Case 1: The sound card driver problem
Solution: I suggest you replace the sound card chip that comes with the motherboard. Driver, or go to the official website of the motherboard manufacturer to download the latest version of the driver, do not use the universal driver that comes with Win7.
Case 2: Mouse-induced
Workaround: In Win7, if the mouse has a side button, then one of the side buttons is set to the mute button by default. If you touch this button, it will cause The system is muted.
Case 3: Windows automatically adjusts the volume function
Solution:

1. Right-click the volume icon on the right side of the taskbar and select the sound from the right-click menu;

2. Click the Communication tab, click Don't do anything, and click OK.

The above is the introduction of the reason why the Win7 system automatically becomes silent mode and the solution. The friend who has the same problem can solve it.