A test build of Windows 10 Build 19645 (Manganese) is available for download, designed for Windows Insider program participants with the Priority of Early Access update priority.
Windows 10 Insider Preview build 19645.1 – an assembly that belongs to the mn_release (Manganese) development branch, is available to Windows Insider program participants with the priority of receiving Early Access updates.
Full build number: 19645.1.mn_release.200605-1502
Transition to the MN_RELEASE development branch
Starting with Windows 10 Build 19628, the name of the development branch from which Microsoft releases assemblies has changed to MN_RELEASE. As we mentioned in December, Microsoft has changed its approach to testing Windows 10, and insiders on the Early Access channel get builds directly from this Active Development Branch. As explained at Microsoft:
In this case, we are developing our ability to change which branch we consider to be the active development branch. This is only a short-term change, and we intend to soon release assemblies within the framework of RS_PRERELEASE. Since our engineers work in development cycles within the company, we can prioritize work in a particular branch, and we may need to move insiders between branches. Builds from the MN_RELEASE branch do not apply to any specific release of Windows 10.
New in Windows 10 build 19645
The music management function becomes available to all users. Your phone
Microsoft is rolling out another update for the “Your Phone” application, which adds the option Show audio file played from the phone for stable versions of Windows 10. This new feature gives you control over the music played on your Android smartphone.
To use this feature, make sure that you have the latest versions of the applications Your Phone for Windows 10 and Your Phone Manager for Android (Communication with Windows for Samsung Smartphones).
Changes and Improvements
The Linux kernel update model for the Windows subsystem for Linux 2 has been changed. Starting with this assembly, the Linux kernel updates are removed from the Windows image and must be obtained through Windows Update, like other third-party software (for example, drivers for video cards).
Nested Virtualization support is available on AMD processors.
Fixed an issue where some devices booting from eMMC drives could start checking for errors when exiting hibernation mode.
Fixed many input problems for Japanese and Chinese languages, which affected the switching of input modes in applications and in the Windows notification area.
Fixed an issue that caused taskbar preview thumbnails to display unevenly (showing an empty area).
Fixed an issue where the handwriting panel would not appear in certain text fields after clicking with the pen.
Fixed an issue where changing the size of an application in tablet mode reduced it to the taskbar rather than resizing the application.
Fixed an issue that caused the Windows Hello installer to freeze if face recognition was already set up and you selected recognition enhancement.
Fixed the problem of some users when the computer did not recognize the smart card when you inserted it (the event log displayed error 621).