1. First, double-click to open "My Computer", find "Control Panel" there, and then click to enter. As shown below:

2. Find the "Hardware and Sound" option in the "Control Panel" and click to enter. As shown below:

3. Then find the "Sound" option, select "Change System Sound", and then click to enter. As shown below:

4. Close all computer prompts, and then select "Mute" directly in the "Sound Scheme" option above. As shown below:

5. After the setting is completed, select the "Apply" button below to set the computer prompt sound. As shown below: