turn off system beeps

• First click on Start button then type Regedit in Run option.

• Here locate the location to:

• HKEY_CURRENT_USER\Control Panel\Sound

Here in right side panel, double click on Beep and change its value of NO. But next time you can turn on these beeps, simply give its value Yes.
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Now close the registry editor and restart your computer after any changes to go into effect.