How to cancel the dell640m "beep" alarm

Reference: http://benyouhui.it168.com/viewthread.php? Action = printable & tid = 501525

Fault symptom:
The system has a great alarm sound, Doodle or tick.
The problem cannot be solved after mute.
Changing the voice scheme to silent or Windows by default cannot solve the problem.
Reinstall the sound card driver and use other input methods.
Many settings are found in the topic and sound solution, which cannot solve the problem.

Solution:
Open "Device Manager", click "View", click "show hidden devices", find "non-plug-and-play devices", and double-click "beep ", change it to "do not use this device in the current hardware configuration file (disabled )"

The system prompts you to restart. Restart the device and enter the Device Manager. You can see that "beep" is disabled.