Turn off the Win7 system boot tone:
Step 1 In the “Start” dialog box, click ““ Control Panel” to enter the interface.
Step 2, click “Hardware & Sound" in the "Control Panel" interface.
In the third step, click on <;Change"
The fourth step, in the sound scheme, is set to "silent" and press the "OK" button. In this way, there will be no sound when you turn it on later.
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