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Microsoft Releases Windows 10 20H1 Preview Build 18917 with WSL 2

Microsoft today released the next build for Windows 10 20H1 for Insiders in the Fast ring. This one includes the long-awaited new version of Windows Subsystem for Linux WSL 2.

Today Microsoft is releasing Windows 10 20H1 preview build 18917 to Insiders in the Fast ring. This new version has more new features than last week’s build 18912 which contained mainly system improvements. Today’s build includes download throttling for the Delivery Optimization feature and Windows Subsystem for Linux 2 (WSL 2). Here is a look at what you can expect

Windows 10 20H1 Build 18917

Download throttling. With the Delivery Optimization feature in Windows 10 you can set upload and download limits for Windows 10 updates. But Microsoft is improving the feature: “We’ve heard from our users with very low connection speeds that setting download throttling as a percentage of available bandwidth isn’t providing enough relief in reducing the impact on their network,” notes Microsoft. This version will provide more control over download throttling with absolute bandwidth values­.

The first version of WSL was shipped with the Windows 10 Anniversary Update. The new version is a major update and includes “Windows Terminal” which was announced at Build 2019. The blog post explains, “WSL 2 is a new version of the architecture that powers the Windows Subsystem for Linux to run ELF64 Linux binaries on Windows.” You can find out more about WSL 2 from Microsoft’s page.

There are also improvements to Windows ink Workspace as well as Narrator improvements when reading data tables. In addition, here’s a look at the other general changes and improvements to expect in today’s new build:

  • We fixed an issue where some users experienced a 0x8007000E error code while downloading the build due to high RAM consumption.
  • We fixed an issue where users couldn’t use the desktop Features on Demand “add a feature” option.
  • We fixed an issue where dragging the emoji and dictation panels was unexpectedly laggy.
  • We’re in the process of rolling out a change in this build to address an issue where if the taskbar was set to autohide, launching the Start menu would first hide the taskbar before bringing up the Start menu.
  • We fixed an issue resulting in the Start menu and taskbar going 100% transparent on secondary monitors or after projection.
  • We’ve updated the new File Explorer search experience to now be dark when used in dark theme. Note – this experience is still in the process of rolling out. Thanks everyone who’s tried it so far and shared feedback, we’ll let you know when the rollout expands.
  • We fixed an issue where Windows Security would crash if launched from Settings when using an Arabic display language.
  • We fixed an issue where the audio service might hang on shutdown if spatial audio was turned on.

Remember, 20H1 is the Insider build that is the feature update expected for Spring of 2020. So, you can expect a lot of bugs and issues for both users and developers. Make sure to read Microsoft’s full blog post for all changes, known issues, and workarounds.


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