Windows 10 19H1 build 18358 goes live for Fast Ring Insiders, along with new Windows Defender Application Guard extensions for Chrome and Firefox

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Microsoft has just released another 19H1 build for Windows Insiders on the Fast Ring today. The 19H1 build 18358 follows the build 18356 released three days ago for these same Insiders, and the new bits bring additional bug fixes, though some known issues are still there.  

Microsoft says that it has resolved some issues with Game Mode in this build, and Windows Insiders streaming games or recording games should enjoy more consistent performance. The company is also still looking to get feedback about its State of Decay game available via the Xbox Insider Hub, and if you haven’t tested it yet the company has just added more slots. You can read more about the other bug fixes and known issues in the build 18358 below:

General changes, improvements, and fixes for PC

  • FOR GAMERS: We have addressed an issue with Game Mode that may degrade game streaming and recording quality.
  • Here’s the latest on trying out our new Windows gaming technology:
    • Still haven’t had a chance to get the game State of Decay for free (for a limited time)? We’ve added even more slots! Whether you’ve tried it in earlier builds or haven’t had the chance yet, these instructions have everything you need.
    • Installed the Insider version of State of Decay already? We’ll be trying out another update later today. To get it, launch the Store app, click […] and then “Downloads and Updates”. Once installed, you shouldn’t see any difference in the game – it’s just a test update – but please let us know if anything doesn’t work!
  • We fixed an issue that could result in the thumbnails in Alt + Tab sometimes becoming offset.
  • We fixed an issue where certain upgrade paths could result in the contents of the Recycle Bin being left under Windows.old.
  • We fixed an issue resulting in upgrades failing at 18% or 25% and rolling back for some Insiders.
  • We fixed an issue resulting in some Insider experiencing green screens with error KERNEL_SECURITY_VIOLATION.
  • We fixed an issue resulting in some apps using the Windows Installer failing to install recently.

Known issues

  • Microsoft Store app updates do not automatically install on 18356+. As a workaround, you can manually check for, and install updates via the Microsoft Store app. Open Select “…” > “Downloads and updates” > “Get updates”.
  • Launching games that use anti-cheat software may trigger a bugcheck (GSOD).
  • Creative X-Fi sound cards are not functioning properly. We are partnering with Creative to resolve this issue.
  • Some Realtek SD card readers are not functioning properly. We are investigating the issue.
  • We’re investigating an issue preventing VMware from being able to install or update Windows Insider Preview builds. Hyper-V is a viable alternative if available to you.

Known issues for Developers
* If you install any of the recent builds from the Fast ring and switch to the Slow ring, optional content such as enabling developer mode will fail. You will have to remain in the Fast ring to add/install/enable optional content. This is because optional content will only install on builds approved for specific rings.

The blog post also mentioned the release of new Windows Defender Application Guard extensions for Google Chrome and Mozilla Firefox. Once the extension is installed, Chrome and Firefox users visiting an untrusted website will be redirected to an isolated Microsoft Edge session where they’ll be able to browse the website securely.

Microsoft says that the Windows Defender Application Guard extensions for Chrome and Firefox are rolling out to Windows Insiders today and will be generally available soon, and they will require Windows 10 Pro or Enterprise version 1803 or newer. This has been a pretty busy couple of days for Windows Insiders overall, and we hope the flow of new builds will continue next week.