Please check whether the device drivers for your Audio Hardware is installed or not. The process is
Start>Run>devmgmt.msc (type and click ok or press enter)
Now find your audio device and check whether drivers for the same are installed or not...
If the device shows mark of exclamation (!) or interrogation (?) beside it, please install drivers for it.
Try and pls reply.
Do you have onboard sound, or did your computer come with an expansion card?
What is the make and model of your computer?
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