Windows 10 build 21370 rolls out to Insiders in the Dev Channel, features fixes and minor changes

Surface Laptop Go Display Pixels
Surface Laptop Go Display Pixels (Image credit: Windows Central)

What you need to know

  • Windows 10 Insider Preview Build 21370 is now available.
  • It brings a lot of fixes and a few changes.
  • It does not bring any major features.

Insiders in the Dev Channel can now grab Windows 10 Insider Preview Build 21370. It's not packing any new major features, but it does include a lot of minor issues across the board and includes a handful of new changes. The Windows Insider Blog kicks off its 21370 build announcement post with an update on Bluetooth improvements, which include the following:

  • Unified audio endpoint: No more clicking through multiple audio endpoints to make your Bluetooth headset's voice and mic work properly. We now only expose one audio endpoint in the UI and will switch to the correct one automatically for you for a seamless experience. Listening to Spotify and then have to hop onto a Teams call? You can also now directly control the volume of your headset.
  • Support for AAC codec: Enjoy premium audio streaming quality wirelessly on your Bluetooth headphones and speakers with AAC codec. Short for Advanced Audio Codec, AAC is a lossy codec that delivers high quality audio streaming in smaller files – great for listening to music online.

Beyond that, three tiny changes have arrived in build 21370:

  • We've made some small adjustments to the icons in File Explorer's address bar.
  • We've improved the touch keyboard launch animation to make it smoother in cases where UWP apps reflow when it appears.
  • We made a change so that if you set focus to the Run dialog, the touch keyboard will now show a backslash () key.

The blog also includes a massive list of fixes that were made in 21370, including remedies for crashes, critical errors, and more. You can see the full changelog for this build on the Windows Insider Blog. And if you're interested in learning how to join the Windows Insider Program so you can experience these builds yourself, check out our guide.

Robert Carnevale

Robert Carnevale is the News Editor for Windows Central. He's a big fan of Kinect (it lives on in his heart), Sonic the Hedgehog, and the legendary intersection of those two titans, Sonic Free Riders. He is the author of Cold War 2395. Have a useful tip? Send it to

  • They're making a lot of nice quality of life improvements. Together, these little things go a long way in improving UX.
    I wish they did this stuff in smaller updates and focused on stability, performance, and UI for major updates like 21H2
  • Remember that there is a timeline for everything. When Microsoft finally brings all the improvements they can during the Dev-test stage of 21H2 (and by that matter "Sun Valley"), in just weeks they’ll bring them to Beta Insiders and when everything is formally over 21H2 may get launched by fall. Of course, any further improvements that occur in Dev while 21H2 is tested by Beta Insiders may become part of "22H1", and I can believe that the service update format will be used to deploy "22H2". Only time will tell...
  • The unified Bluetooth audio endpoint thing sounds really interesting. But curious how it works out in practice. I use Zoom both for calls and for watching/listening to performances or religious services. In these cases I definitely want my Bluetooth earbuds to be on stereo mode (or I don't get good audio in stereo). My solution has been to change my mic to the laptop from the earbuds, and then I can use the stereo Bluetooth earbuds as the speaker. Not sure this would help with that...
  • Weird. My PC keeps rolling back and refusin to install this update. After I restart my PC in order to start configuring and installing the update, my PC tells me, "Undoing changes made to your PC" then I'm back to Build 21364.
  • After installing this update, I have no internet access at all(wired or wireless). Tried reset network, still no internet. Any solution?