Windows 10 Insider Previews: A guide to the builds

Preview builds for the Windows 10 May 2019 Update (19H1, version 1903)

Windows 10 Insider Preview Build 18362

Release date: March 20, 2019

This minor build has a single fix, for an issue in which the Connect app crashed on launch for some Insiders.

There are fewer than a half-dozen known issues in this build, including one in which launching games that use anti-cheat software may trigger a bug check (GSOD), and another in which Creative X-Fi sound cards do not work properly.

(Get more info about Insider Preview Build 18362.)

Windows 10 Insider Preview Build 18358

Release date: March 15, 2019

This minor build has only minor fixes. Among the bugs fixed are one in which Game Mode degraded game streaming and recording quality, and another in which some Insiders had green screens with the error KERNEL_SECURITY_VIOLATION.

There are fewer than a half-dozen known issues in this build, including one in which launching games that use anti-cheat software may trigger a bug check (GSOD), and another in which Creative X-Fi sound cards do not work properly.

Separate from this build, Microsoft also is releasing Windows Defender Application Guard extensions for Google Chrome and Mozilla Firefox. Get the Google Chrome extension here,  and the Mozilla Firefox extension here.

(Get more info about Insider Preview Build 18358.)

Windows 10 Insider Preview Build 18356

Release date: March 12, 2019

This minor build adds a new feature to Windows 10’s Your Phone app: the ability to mirror your Android phone’s screen directly to your PC. You’ll get access to your phone apps from your PC, such as for getting rides, checking social updates and so on. Note that it may take a few days for every Insider to get this feature.

There are also a variety of minor fixes and small improvements. Among the fixes is for a bug in which Microsoft Edge crashed when interacting with combo boxes in PDF forms, and another in which using the slider to adjust the night light strength could result in the night light getting stuck on.

There are fewer than a half-dozen known issues in this build, including one in which launching games that use anti-cheat software may trigger a bug check (GSOD), and another in which Creative X-Fi sound cards do not work properly.

(Get more info about Insider Preview Build 18356.)

Windows 10 Insider Preview Build 18353

Release date: March 8, 2019

This minor build includes only small fixes and improvements. One fix is for an issue in which bug checks were launched when a laptop lid was closed or a monitor was plugged into a PC or unplugged from it. The small improvements are all related to Windows Sandbox, including one that turns on the Ctrl + Alt + Break key sequence in Windows Sandbox to allow a PC to enter or exit full-screen mode.

There are fewer than a half-dozen known issues in this build, including one in which launching games that use anti-cheat software may trigger a bug check (GSOD), and another in which Creative X-Fi sound cards do not work properly.

(Get more info about Insider Preview Build 18353.)

Windows Insider Preview Build 18348

Release date: March 1, 2019

This minor build has only one new feature, a first look at Emoji 12.0 emoji. Press WIN+(period) or WIN+(semicolon), all and you’ll be able to search keywords to find the emoji you want. Keywords include otter, sloth, waffle, ballet shoes and many other.

In addition, there are a variety of fixes, including for a bug in which in Microsoft Edge sometimes crashed when users edited or tabbed through PDFs, and another in which if high contrast mode was enabled during Windows setup, that state wouldn’t persist after the first logon.

There are fewer than a dozen known issues in this build, including one in which launching games that use anti-cheat software may trigger a bug check (GSOD), and another in which the mouse pointer color might be incorrectly switched to white after signing out and signing back in.

(Get more info about Insider Preview Build 18348.)

Windows 10 Insider Preview Build 18346

Release date: February 26, 2019

This extremely minor build offers only small fixes, including one for a bug in which the Bluetooth hands-free audio driver would hang and another in which the taskbar search box text became a black background.

There are fewer than a dozen known issues in this build, including one in which launching games that use anti-cheat software may trigger a bug check (GSOD), and another in which navigating to the Narrator settings in Windows Sandbox crashes the Settings app.

(Get more info about Insider Preview Build 18346.)

Windows 10 Insider Preview Build 18343

Release date: February 22, 2019

This extremely minor build has only one notable feature: It allows PCs with Intel64 Family 6 Model 142 and Intel64 Family 6 Model 158 processors to get insider builds. PCs with those processors could not download the previous build, 18342.

The build also fixes an issue that required an additional reboot when performing Reset this PC and selecting Keep my files on a device that has Reserved Storage enabled.

There are fewer than a dozen known issues in this build, including one in which in which if you try to navigate to the Narrator settings In Windows Sandbox, the Settings app crashes.

(Get more info about Insider Preview Build 18343.)

Windows 10 Insider Preview Build 18342

Release date: February 20, 2019

This build fixes a variety of bugs in Windows gaming technology and offers fixes and workarounds for the game State of Decay. In addition, the build also lets people access Linux files in a WSL distro from Windows. The files can be accessed through the command line. Windows apps including File Explorer, VSCode and others can also interact with the Linux files.

The build includes an assortment of fixes and small changes, including fixing an issue in which Windows Sandbox would not start on localized builds, and another in which right-clicking the desktop would bring up a light-colored context menu in dark theme.

The build has fewer than a dozen known issues, including one in which launching games that use anti-cheat software may trigger a bug check (GSOD), and another in which if you try to navigate to the Narrator settings in Windows Sandbox, the Settings app crashes.

Microsoft also says that the features for what it calls inbox apps — the Windows 10 apps that ship with the next Windows 10 upgrade — are now set and will not change any further. So you may notice some differences in those apps compared to previous versions, notably that some features have disappeared.

Note that PCs with certain processor model numbers (Intel64 Family 6 Model 142 and Intel64 Family 6 Model 158) will not receive this build because of an issue with Connected Standby. To check the model number of your processor, take the following steps:

1. Open Device Manager by right-clicking on the Start button on your taskbar.
2. Open the Processors group and right-click on one of the processors listed. (You will see “multiple” for each core of the processor in your PC.)
3. Click Properties and go to the Details tab.
4. Choose “Hardware Ids” in the property drop-down. This will give you the model number of your processor.

(Get more info about Insider Preview Build 18342.)

Windows 10 Insider Preview Build 18329

Release date: February 1, 2019

This minor build allows desktop (Win32) applications run in Windows Mixed Reality in the same way that Microsoft Store apps can, although the feature is likely to be buggy. Also included are small changes to Mail and Calendar, including the ability to run in dark mode. And when you open Search Home on the Start screen, you’ll find icons for the apps you run most frequently.

There are also an assortment of fixes and small changes and improvements, including fixing an issue in which video playback went black after rotating a device from landscape to portrait, and fixing another issue in which Win32 apps had unexpectedly long launch times.

The build has more than a dozen known issues, including one in which the Windows Security app shows an unknown status for the “Virus & threat protection” area or doesn’t refresh properly and others in which Windows Sandbox may launch to a black screen and in which launching games that use anti-cheat software may trigger a bug check.

(Get more info about Insider Preview Build 18329.)

Windows 10 Insider Preview Build 18323

Release date: January 24, 2019

This minor build improves Windows 10’s support for the RAW image format used by digital cameras. You’ll now be able to view RAW image thumbnails, previews and camera metadata of previously unsupported RAW files from inside File Explorer. You can also view your RAW images at full resolution in any Windows app that uses Windows Imaging Component framework to decode raw images, such as the built-in Photo app.

Windows 10’s Light Theme gets a variety of fixes and small tweaks, including solving an issue in which the text in the battery flyout can become unreadable in the Light Theme because the text is white.

There’s also the usual assortment of fixes and small changes and improvements, including fixing an issue in which closing an open Excel window from the taskbar might cause Excel to become non-responsive, and another in which the quick actions section of Action Center was sometimes missing.

The build has more than a dozen known issues, including one in which launching games that use anti-cheating software may trigger a bug check, another in which the Windows Security app shows an unknown status for the “Virus & threat protection” area, or doesn’t refresh properly, and another in which Windows Sandbox may launch to a black screen.

(Get more info about Insider Preview Build 18323.)

Windows 10 Insider Preview Build 18317

Release date: January 16, 2019

This build makes one major change to Windows 10 — Cortana and Windows’ search capabilities have now been separated. When you do a search by typing into the search box, it no longer activates and uses Cortana. Instead, it uses Windows’ basic search. If you want to use Cortana, you instead click a new Cortana button to the right of the search bar.

The build also improves font handling with new options in Settings, including the ability to drag and drop font files from File Explorer to Settings > Fonts in order to install them. Microsoft also claims it has improved Start reliability. And Windows Console has received a variety of small fixes, including fixing an issue in which consoles grow in height if scroll-forward is disabled.

There are also a variety of other fixes, including for a bug in which Windows Sandbox wouldn’t launch on PCs with multiple GPUs, and another in which File Explorer locked USB drives when trying to safely eject them.

The build has more than a dozen known issues, including one in which the quick actions section may be missing from Action Center, another in which launching games that use anti-cheating software may trigger a bug check, and another in which the Windows Security app shows an unknown status for the “Virus & threat protection” area, or doesn’t refresh properly.

(Get more info about Insider Preview Build 18317.)

Windows 10 Insider Preview Build 18312

Release date: January 9, 2019

This build makes a significant change in how Windows 10 manages disk space — a move Microsoft says it’s making to improve Windows performance and reliability. With this build, Windows sets aside reserved storage space to be exclusively used by updates, apps, temporary files, and system caches. Without enough disk space, when a PC’s storage is used up, applications and Windows itself can be unreliable. (For more information about PC performance and disk space, see the Microsoft blog post, “Reserving disk space to keep Windows 10 up to date.”)

Note that this feature will only be turned automatically on in PCs that come with the next version of Windows 10 (which Microsoft refers to as 19H1) pre-installed or on PCs in which 19H1 was clean installed. However, Windows Insiders can go here and follow the instructions, and reserved storage will be turned on in the next insider preview build.

Apart from that, there are only very minor changes in this build, including improvements to the Windows Subsystem for Linux command line such as importing a distribution for easy sideloading including to non-system drives.

There are also a variety of fixes, including for a bug that made the Edge browser unreliable and another in which the Network shares page in File Explorer used black text in dark theme.

The build has more than a dozen known issues, including one in which launching games that use anti-cheating software may trigger a bug check, and another in which the Windows Security app shows an unknown status for the Virus & threat protection area or doesn’t refresh properly.

(Get more info about Insider Preview Build 18312.)

Windows 10 Insider Preview Build 18309

Release date: January 3, 2019

This minor build has only a few new features. It’s now easier to reset your Windows Hello PIN, and you can sign into Windows with a phone number rather than a password. Both of these features were in the previous build for Windows 10 Home users only, but now work with all Windows 10 editions. In addition, the Narrator has gotten a few small improvements, including additional voices.

There are also a variety of small improvements and fixes, including fixing an issue that caused explorer.exe to crash when right-clicking a network printer, and fixing another in which changes to Mouse Keys settings in Settings would not persist.

Known issues in this build include the Windows Security app showing an unknown status for the Virus & threat protection area, or not refreshing properly.

(Get more info about Insider Preview Build 18309.)

Windows 10 Insider Preview Build 18305

Release date: December 19, 2018

This build includes a wide variety of new features and changes. The biggest change to the interface is a new, simplified default Start layout for new devices, new user accounts, and clean installs. It’s now a one-column design with fewer top-level tiles and is sleeker-looking than the existing layout. Note that the new layout won’t immediately appear when updating to this build. Instead, it will default to whatever you’ve already been using.

Windows Clipboard also gets a facelift, notably making it far more compact than the version introduced in the October 2018 Windows 10 Update.

This build also introduces a new security feature, Windows Sandbox, which can run desktop applications in isolation so they can’t harm your PC if they’re malicious or have been infected with malware. Microsoft describes it as “an isolated desktop environment where you can run untrusted software without the fear of lasting impact to your device. Any software installed in Windows Sandbox stays only in the sandbox and cannot affect your host. Once Windows Sandbox is closed, all the software with all of its files and state are permanently deleted.”

The Windows Security app has also gotten a tweak, mainly by revamping its protection history listings, offering more details about each action, as well as new information such as controlled folder access blocks.

Windows will now automatically recommend troubleshooting to keep your PC running more smoothly, for example by recommending turning off a setting than can cause an app to crash. And symbols and Kaomoji (faces created with only text characters) can now be inserted with a hotkey.

With this build, Microsoft continues to work on eliminating passwords and using other means of account verification. In this build, if your Microsoft account has a phone number, you’ll be able to use an SMS code to sign in and set up your Windows 10 account. You can then use a variety of ways to sign into Windows 10, including using Windows Hello facial recognition, a fingerprint, or a PIN.

For enterprises, Microsoft introduces Automatic Restart and Sign On (ARSO), which automatically signs in a user after an update to finish setting up and then locks the PC. It’s only available on PCs that have these security requirements:

• BitLocker enabled and is not suspended during the upgrade
• TPM 2.0
• SecureBoot

Cortana also gets a little bit smarter in this build: It can add your reminders and tasks to your Microsoft To-Do lists. All lists and reminders in Microsoft To-Do, Cortana, and tasks in Outlook are now available in the Microsoft To-Do app. The app can be accessed on Android phones, iPhones, Cortana, the web and your PC.

The build also introduces a new Office app that lets you see all of your Microsoft Office files and launch any Office application. Check out this Office 365 blog post for more details.

There are also a wide variety of small improvements and fixes, including adding shadows throughout the user interface following Microsoft’s Fluent Design guidelines, a slightly revamped Settings homepage, and a new default date format in Windows Explorer.

Known issues in this build include Windows Security showing an unknown status for the Virus & threat protection area, or not refreshing properly, and USB printers appearing twice in the Devices and Printers under Control Panel. Reinstalling the printer resolves the issue.

(Get more info about Insider Preview Build 18305.)

Windows 10 Insider Preview Build 18298

Release date: December 10, 2018

This build includes a variety of minor additions throughout Windows. You can now set up a security key for signing into Windows in the Settings app, and the default sorting display for downloaded files has been changed to the most recently downloaded. There’s also a new context menu choice for unpinning groups and folders on the Start menu.

The touch keyboard received several improvements, including one that those with errant fingers will appreciate: The “hit target” of each key (where the key is typically pressed) will change based on prediction of what letter will most likely be typed next. This is expected to result in more accurate typing.

The Notepad gets several small changes, including one in which it shows an asterisk in the title bar in front of the document’s name to indicate that the document has unsaved changes. The Narrator has also seen several improvements, including the new Narrator Home, a one-stop shop for Narrator instructions, tips and settings. Users are sent to Narrator Home every time Narrator is started. And Snip & Sketch gets several bug fixes and reliability improvements, including fixing an issue in which the bottom of a snip gets truncated.

There are also a wide variety of small improvements and fixes, including fixing an issue in which Settings crashed when clicking “Check for Updates,” and another in which the handwriting panel might crash when a pen was used for input into win32 apps.

Known issues in this build include the Settings page crashing when users click on the “View storage usage on other drives” option under System > Storage, and another in which USB printers may appear twice in the Devices and Printers under Control Panel. Reinstalling the printer resolves the issue.

(Get more info about Windows 10 Insider Preview Build 18298.)

Windows 10 Insider Preview Build 18290

Release date: November 28, 2018

This build includes only relatively minor additions, such as incorporating Microsoft’s Fluent design guidelines into the Start menu with the use of new icons. You can now also tell which app is using your microphone by hovering your mouse over the microphone icon in the taskbar. There’s also a new landing page for when you perform searches. Microsoft To-Do has also been added to Mail & Calendar.

There are also a wide variety of small improvements and fixes, including fixing an issue in which PDFs opened in Microsoft Edge did not display correctly, and making Narrator more compatible with Chrome.

Known issues in this build include the Settings page crashing after the account password or PIN is changed. Settings will also crash when opening Speech Settings or clicking on the “View storage usage on other drives” option under System > Storage.

Note that the builds previous to this one have a built-in expiration date that Microsoft calls a “timebomb.” The timebomb is set to go off on December 14, after which those builds will no longer work. Insiders need to update to Build 18290 or later before then to avoid that.

(Get more info about Windows 10 Insider Preview Build 18290.)

Windows 10 Insider Preview Build 18282

Release date: November 14, 2018

This build adds a new light theme, created to provide more contrast to the Windows dark theme. In the new light theme, the taskbar, Start menu, Action Center, touch keyboard and other interface elements are light instead of dark. Additionally, the OneDrive flyout now supports the Windows dark theme.

There are also new features added to the Snip & Sketch screen capture tool, including a delayed mode and the ability to capture individual windows. Windows Update has received minor improvements, including making it easier to pause updates and having Windows detect the best hours to perform updates. And Narrator has gotten a variety of additions, including making read-by-sentence commands available via a braille display.

There are also a variety of small improvements and fixes, including fixing an issue that caused File Explorer to freeze when interacting with video files, and another in which x86 apps and games had blurry text rendering.

Known issues in this build include the Settings page crashing after changing the account password or PIN, and PDFs opened in Microsoft Edge not displaying correctly – they’re too small, instead of using the entire space.

(Get more info about Windows 10 Insider Preview Build 18282.)

Windows 10 Insider Preview Build 18277

Release date: November 7, 2018

This build includes only minor changes, including the ability to customize the way Action Center works from directly within it instead of having to go through Settings, and the ability to use Focus Assist, which lets you turn off alerts, while you’re in full screen mode. The build also shows off the emoji Microsoft has designed so far in preparation for the release of Emoji 12.

There are also a variety of small improvements and fixes, including fixing an issue that resulted in Timeline crashing explorer.exe if you pressed Alt-F4 while it was visible, and another that affected Emoji Panel reliability.

Known issues in this build include the Settings page crashing after changing the account password or PIN, and PDFs opened in Microsoft Edge not displaying correctly — they’re too small, instead of using the entire space.

(Get more info about Insider Preview Build 18277.)

Windows 10 Insider Preview Build 18272

Release date: October 31, 2018

This build will please fans of Windows Hello, a feature that lets people sign into Windows using a fingerprint, facial recognition or a PIN instead of a password. Microsoft admits in its note on the build that the sign-in screen for Windows Hello had been cluttered and confusing. So it’s redesigned it, by condensing sign-in options into a list that explains what each option does, and its next step for setup.

The Snip & Sketch screen capture and markup tool has been improved in a variety of ways, including an option to add borders to a screenshot so that it stands out when copied into a document. You can also now print screenshots, and you can save screenshots in .jpg and .gif formats.

There are also several small improvements and fixes, including for an issue that could result in Settings crashing when navigating to Data Usage, and one in which enhancements selected under Speaker Properties > Enhancements wouldn’t persist on upgrade.

Known issues in this build include Task View failing to show the + button under New Desktop after creating two Virtual Desktops, and PDFs opened in Microsoft Edge not displaying correctly — they’re too small instead of using the entire space.

(Get more info about Insider Preview Build 18272.)

Windows 10 Insider Preview Build 18267

Release date: October 24, 2018

This minor build adds a new enhanced mode for the search indexer. You can now tell Windows to search all your folders and drives, instead of limiting the search to Documents, Pictures, Videos, and Desktop by default. Beyond that, there are a few small accessibility improvements, including Narrator working better with Chrome. In addition, there are several small improvements and fixes, including for an issue that caused Settings to crash when invoking actions in certain places, including under Windows Security.

There are a handful of known issues in this build, including one in which when you change Task Manager settings, the next time Task Manager is opened it will revert to the default.

(Get more info about Insider Preview Build 18267.)

Windows 10 Insider Preview Build 18262

Release date: October 17, 2018

This minor build adds a new optional column to the Details tab of Task Manager so you can find out the DPI awareness per process. DPI awareness properly displays fonts and applications when the resolution of a monitor changes. The build also allows users to easily uninstall some preinstalled Windows applications such as Calendar, Mail and Calculator via the context menu.

There are a variety of other changes, improvements and fixes, including a fix for a bug in which Task Manager’s icon in the notification area of the taskbar did not stay visible while Task Manager was open. There are several known issues with the build, including one in which Settings crashes when taking actions on certain pages.

(Get more info about Insider Preview Build 18262.)

Windows 10 Insider Preview Build 18252

Release date: October 3, 2018

This minor build has only a few small changes. For instance, you can now configure advanced Ethernet IP settings in the Settings app, including support for a static IP address and configuring a preferred DNS server. Previously, you could only make these changes in Control Panel. It’s part of Microsoft’s ongoing effort to consolidate settings in one location rather than several.

There’s also the usual variety of fixes, including for a bug that caused Task Manager to report inaccurate CPU usage, and another where the arrows to expand “Background processes” in Task Manager used to “blink constantly and weirdly,” in Microsoft’s words.

In its description of the build, Microsoft warned, “As is normal with builds early in the development cycle, builds may contain bugs that might be painful for some…If this makes you uncomfortable, you may want to consider switching to the Slow ring.”

Among the known issues with this build are one in which Settings crashes when invoking actions on certain pages.

(Get more info about Insider Preview Build 18252.)

Windows 10 Insider Preview Build 18247

Release date: September 26, 2018

This build has only a handful of small fixes, including one for a bug in which app icons sometimes became invisible in the taskbar and another in which WebView controls did not respond to the keyboard.

There are also several known issues, including one in which File Explorer’s context menu has an unexpectedly thick white border. The problem in the previous build with arrows that expand “Background processes” in Task Manager “blinking constantly and weirdly” remains in this build as well.

(Get more info about Insider Preview Build 18247.)

Windows 10 Insider Preview Build 18242

Release date: September 18, 2018

This build has only small fixes, including for a bug in which the back button in Settings and other apps became white text on a white background if you hovered over it, and another that caused some apps to crash when you tried to save a file from the app.

There are three known issues in this build, including one in which Task Manager is not reporting accurate CPU usage, and another in which the arrows used to expand “Background processes” in Task Manager “are blinking constantly and weirdly,” in Microsoft’s words.

 (Get more info about Insider Preview Build 18242.)

Windows 10 Insider Preview Build 18237

Release date: September 12, 2018

This build adds the acrylic translucent texture from Microsoft’s Fluent Design to the Windows sign-in screen. There’s also a wide variety of fixes, including for an issue where Task Manager couldn’t be resized, and another where if you opened one of the taskbar flyouts (like network or volume), and then quickly tried to open another, it wouldn’t work.

There are three known issues in this build, including one in which Narrator sometimes does not read in the Settings app when you navigate using Tab and arrow keys.

(Get more info about Insider Preview Build 18237.)

Windows 10 Insider Preview Build 18234

Release date: September 6, 2018

This build adds support for handwritten input into the Microsoft To-Do app. There’s also an update to the Sticky Notes app, which syncs notes across devices, among other improvements. The Snip & Sketch screen capture and annotation tool gets new options, including the ability to delay screen capture a certain amount of time.

Aside from that, there are several dozen fixes and changes, including for an issue in which logging out of your user profile or shutting down your PC would cause the PC to perform a bug check (GSOD), and another that caused Start to be unreliable.

There are half-a-dozen known issues in this build, including one in which the background of notifications and the Action Center lose color and become transparent, and another in which when you use the Ease of Access Make Text bigger setting, you might see text clipping issues or find that text is not increasing in size everywhere.

(Get more info about Insider Preview Build 18234.)

Windows 10 Insider Preview Build 18219

Release date: August 16, 2018

This build includes improvements to the Narrator, including increased reliability and improved Braille usage. There’s also a variety of changes and fixes, including for an issue in which the icons in the Microsoft Edge extension pane were drawing unexpectedly close to the toggles and one in which minimized apps had squished thumbnails in Task View.

There are 11 known issues in this build, including one in which the taskbar flyouts (network, volume, etc.) no longer have an acrylic background.

(Get more info about Insider Preview Build 18219.)

Windows 10 Insider Preview Build 18214

Release date: August 10, 2018

This build includes the Your Phone app introduced with the Windows 10 October 2018 update. Aside from that, it only has minor fixes, such as fixing an issue in which Timeline’s scrollbar didn’t work with touch and one in which the Windows Security icon in the taskbar system tray would become a little bit blurrier every time there was a resolution change.

There are more than a dozen known issues in this build, including one in which in Narrator’s automatic dialog reading the title of the dialog is spoken more than once.

(Get more info about Insider Preview Build 18214.)

Windows 10 Insider Preview Build 18204

Release date: July 25, 2018

This is the first preview for 19H1. It includes no new features — it’s the same as the Preview Build 17723 for Redstone 5.

(Get more info about Insider Preview Build 18204.)