Windows 10 build 21390 drops in the Dev Channel

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• Windows 10 build 21390 is ready for download in the Dev Channel.
• This build introduces new icons for Task Manager and MSI installers.
• You can now set Windows Terminal as the default emulator for Command Prompt and PowerShell.

As part of the ongoing development of the Sun Valley update (version 21H2), Microsoft is now rolling out Windows 10 build 21390. This is preview number 76 releasing to testers and is a minor update with various improvements and fixes.

According to the company, build 21390 introduces a new icon using the Fluent Design language for Task Manager and MSI installers. Also, you can now set Windows Terminal as the default emulator for Command Prompt and PowerShell so that when you try to open one of the consoles, it will default to the Terminal experience. (This requires Windows Terminal version 1.9 to work.)

As for fixes, Windows 10 build 21390 addresses problems with punctuations in Chinese, svchost.exe crashes, Start reliability, Task Manager showing the incorrect icon for some processes, fixes error code 0xc1900101 updating to the latest build, and more.

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Known issues with build 21390

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Microsoft is also pointing out several issues with build 21390, including:

• The Camera app does not respect the default brightness setting set available on the new Camera Settings page.
• Windows Search elements no longer display correctly in the dark theme.
• The “news and interests” taskbar widget has an issue that may occasionally flash in the top left corner of your screen after clicking the button on your taskbar.

Microsoft is listing the complete set of improvements, fixes, and issues for Windows 10 Insider Preview build 21390 at the Windows Blog.

Download Windows 10 build 21390

The build 21390 preview is available immediately through the Dev Channel, and it will install automatically. However, you can always get it manually from Settings > Update & security > Windows Update and clicking the Check for updates button.

You can learn more about all the changes available in the current development process of Windows 10 in this guide.