Hi Vikram_jais7588,
Hi Vikram_jais7588,
Thank you for visiting the HP Support Forums and Welcome. I have read your thread on your HP 15-d006tu Notebook and having a volume issue. Here is a link to help with your sound.
I would try to uninstall the driver and restart the computer, then install the driver.
You could try this fix from Microsoft.
1. Right click speaker icon (right hand corner)
2. Select Playback devices
3. Right click Speakers
4. Enable it and set as Default
5. Click Apply/Ok
Hope this helps.
Thanks.