Microsoft has finally delivered a fresh new Windows 10 Insider Preview Build to those in the Fast Ring. The company couldn't release this build last week due to a blocking bug.

Windows 10 Build 19603 brings some useful new features, includingFile Explorerintegration in the Windows Subsystem for Linux (WSL). Here's the complete changelog of today's build, which looks quite a big one when compared to last few releases.

File Explorer Integration in the Windows Subsystem for Linux (WSL)

If you have WSL installed and open up File Explorer, you’ll see a familiar face!

We’ve had the ability to access your Linux files since Windows 1903, but now you can easily get to them from your left-hand navigation pane in File Explorer.Selecting theLinux icon will show you a view of all your distros, andselectingthose will place you in the Linux root file system for that distro.

User cleanup recommendations in Storage Settings

Free up disk space with this Storage Settings feature that gathers unused files and apps so you can digitally cleanse your device.

Windows cannot predict whether you want to delete personal files, uninstall apps, or remove local copies of files synced to the cloud. With this tool, all the content is gathered in one page and removable by you with a few clicks.

Other updates for Insiders

Introducing Microsoft News Bar (Beta)

We would love to get your early feedback from Insiders on a new news consumption app for Windows 10. This News Bar brings you the latest news from the Microsoft News network of over 4,500 publishers across the globe. It’s there to keep you up to date when you need it, how you need it, and where you need it. You can customize the experience to make it just right for you. If you need to focus, minimize it with a click, and bring it back when you’re ready.

A few cool things about this app:

Stories are continuously updated throughout the day.Hover for quick access or select to get the full story.Provides News and Stocks today, with Weather and Sports coming in the future.Highly configurable, allowing you to place it on the side you want it, change the background color, change the appearance of what is shown, and which country you want the news from.Supports dark and light themes in Windows​ 10.Supports Multiple Monitors​.

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The News Bar is only available for your Windows 10 PC.Get the News Bar here.Give it a try and let us know how we can make it better!

Raw Image Extension now supports Canon CR3 format

Support for Canon’s latest CR3 raw format has been a popular request ever sincethe Raw Image Extension was announced and then released to the store in 2019. If you’ve been waiting for this feature, we have good news for you. The latest version of the extension (1.0.307610.0) that’s now flighting to Windows Insiders includes support for Canon CR3 files, increased camera support, and several bug fixes.

Check out this libraw.org documentationfor a complete list of supported cameras. Please note that GoPro raw camera format (.GPR) is still not supported.

Here is how to try this out:

If you have a previous version of the extension installed on your device, first you should confirm if your current installation has been automatically updated to the latest version (version 1.0.307610.0). Use these steps:Go toSettings > Apps.Search for and select Raw Image Extension.SelectAdvanced optionsfrom under the name of the extension.If the displayed version number on the Advanced options page is 1.0.307610.0 or later, then you are up to date.Otherwise, search forRaw Image Extensionfrom the Store app to go the app page.If you’d previously installed the app on your device, the update should start automatically.If not, select theUpdatebutton or if the app wasn’t already installed on the device, selectGet, followed by theInstall

Note:This version is currently only available to Windows Insiders.

We would love to get your feedback. Please send your feedback throughFeedback Hubunder theDevices and Drivers > Video Playbackcategory.

Windows 10 19603: General changes & improvements

Going forward, services that are implemented by binaries residing in the user profiles will be persisted on upgrades.Narrator will no longer automatically enable scan mode when interacting with the Ideas pane in Excel. In the new Microsoft Edge, Narrator now automatically enables scan mode and starts reading webpages.

Windows 10 Insider Preview Build 19603: Fixes

We are removingthe known issue for incompatibility issuesdue to changes in the operating system between some Insider Preview builds and certain versions of BattlEye anti-cheat software. If you run into issues playing games that use BattlEye anti-cheat software, please submit feedback on these issues to us viaFeedback Hub.We fixed an issue causing webcams to not function correctly when attempting to make a video call in Microsoft Teams.We fixed an issue resulting in some Insiders experiencing a green screen citing an error with mssecflt.sys when starting safe mode on recent builds.We fixed an issue resulting in the WIN + PrtScn keyboard shortcut no longer saving a picture to file.We fixed several reported stability issues with Narrator, including a fix where it will no longer crash when selecting text in scan mode with new Edge when remote operations are off.We fixed an issue leading to the Narrator Quick Start guide crashing while traversing it with Narrator.We fixed an issue where the EXE property information was incomplete in Task Manager for EoAExperiences.exe.We fixed an issue resulting in some devices experiencing a bugcheck (GSOD) during the reboot to install an update.We fixed an issue resulting in some Insiders experiencing a sporadic bugcheck (GSOD) with the error CRITICAL_PROCESS_DIED.We fixed a bugcheck with error KMODE_EXCEPTION_NOT_HANDLED some Insiders were experiencing when trying to sign out from the current user.We fixed an issue resulting in some Insiders receiving driver compatibility warnings when trying to update to a newer build in certain virtual environments.We fixed an issue that led to inaccurate size estimates for disk cleanup when the option to clean up old Windows installation files was included.We fixed an issue where Storage settings would say the option to clean old Windows installation files wasn’t available, because it had been automatically removed after a certain number of days, when actually you had manually selected to remove it.We fixed an issue that could result in Settings crashing when navigating to Network & Internet for some Insiders.We fixed an issue where you would see a notification from the Shared Experiences page saying your account needed fixing, however the Fix Now option on the page wouldn’t work.We fixed an issue where if the Cortana icon was turned off on the taskbar, it might still partially display on secondary monitors.We fixed an issue resulting in not being able to drag and drop files into the root of a network share folder.We fixed an issue where the IME context menu wouldn’t appear when pressing Shift+F10 if the display language was something other than English.We fixed an issue that could result in IMEs created for Amharic and Sinhala to not input text until rebooting your PC.

We fixed a crash some Insiders were encountering when switching window focus while an IME candidate pane was open.

For known issues and more details, head over to the official blog post.