The sound device on a Sony laptop computer is internal. This means that as opposed to plugging into the outside of a case, it is plugged directly into the motherboard. Because of this, if you're having issues with your sound device it is due to a problem with that device's driver. Uninstalling and reinstalling the driver (and then restarting your computer) will fix that problem, but this all must be done in a very specific way.
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Click "Control Panel."
Click "Device Manager."
Right-click on the object listed under "Sound Controllers." This is your Sony laptop computer sound device. Click "Properties." Click the "Driver" tab. Click "Uninstall." This will remove the driver for your Sony laptop computer sound device. Exit the Device Manager and restart your computer. When Windows loads again, it will recognize that there is a sound device present in your computer's case but no driver is present at the operating system level. Windows will then take it upon itself to reinstall that driver, which will fix your sound device.
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