Hi,
Try to check if you have installed an audio driver for your computer/laptop. You can see this under Device Manager.
Here's how to go there:
1) Right click My Computer.
2) Go to Manage
3) A window will appear. Click Device Manager.
If you see a yellow exclamation mark under Sound, Video and Game controller, that means that you have no driver installed for that corresponding device.
If that is the case, you should install a driver for your audio device in order for it to work. Your computer/laptop comes with a CD/DVD that contains all the drivers for your devices. If you can't find yours, try to search online for the audio driver of your computer/laptop.
Hope it helps!
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