Windows 10 audio stops working after installing Intel Smart Sound Technology driver (version 09.21.00.3755)

Earlier this week, Intel unintentionally released version 9.21.00.3755 of the Intel Smart Sound Technology (ISST) Driver through Windows Update, and inadvertently offered it to a range of devices running Window 10 version 1803 or 1809. If your device contained a compatible audio driver, the new driver overrode it and caused audio to stop working.

We are working with Intel to resolve this issue, and as soon as we learned of the issue on October 11, we made sure the driver was no longer being offered through Windows Update. If it was already installed on your device, you will need to uninstall the driver using the following instructions.


 
  1. From the Start menu, type Device Manager in the search box. Select Device Manager from the search results.
  2. Find and expand Sound, video, and game controllers.
  3. Look for a Realtek device, or a device that has a yellow triangle with an exclamation point.
  4. Click on the device to select it.
  5. Go to the Device Manager View menu, and then select Devices by connection.
  6. Look at the controller device - this should be called Intel Smart Sound Technology driver version 09.21.00.3755.
  7. Right-click the controller device.
  8. Choose Properties.
  9. You should get a dialog like below. Click on the Driver tab as shown:
 
 

 
10.  If the driver version is 9.21.0.3755, you have the driver that was sent to you incorrectly.
11.  Click Uninstall Device. You will get a popup asking if you want to remove the driver.
 

 
13.  Check the checkbox as shown, so the driver will be removed.
14.  Click Uninstall.
15.  When the driver is uninstalled, reboot your system.
16.  Your audio (speakers and headphones) should work after the reboot.
 
 
 
 

 

Discussion Info

Last updated December 14, 2019 Views 22,819 Applies to:

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has anybody tried this?

has anybody tried this?

No - the steps don't match my system and I still have the X and no Sound - Whey don't they just send us a NEW Update with the steps inside the fix!!! 

Just roll back the driver.
Ian Chen
worked fine on dell xps15 - i7 6700

I have HP Laptop, after updations of windows 10 on 11th oct 2018, my audio driver fell ill and died :)

Need help from community / forum to get it alive.

 
Instructions were very easy to follow and worked fine on HP Pavillion Flagship laptop.  Volume back!
agreed!  

yea it didnt work

This happened to you to? I thought I was the only one! I updated it on the 11th and then when I opened it it was gone no audio even in the Device manager there is no Realtek audio. Only intel, which is kinda annoying due to the fact we need the Realtek to even fix the issue.

I tried videos none have worked sadly.

My computer is a HP aswell

No audio

It was working fine before

No realtek

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