KB5060838 (build 26200.5670) officially becomes Windows 11 25H2 in Dev Channel

• Windows 11 build 26200.5670 is a preview update released in the Dev Channel, officially marking the transition to version 25H2.
• This build introduces passkey support with 1Password, updates the Default Apps settings for users in Europe, and includes fixes for File Explorer, the Start menu, and system input reliability.
• The company is also making available Windows 11 build 26120.4520 (KB5060834) in the Beta Channel, with the same changes, but for version 24H2.

Microsoft is now rolling out the Windows 11 build 26200.5670 as the update KB5060838 in the Dev Channel. While this preview doesn’t introduce many flashy changes, it marks the first build that officially changes the version number to 25H2.

According to the official changes, the update KB5060838 introduces 1Password support for the passkey feature and updates the process to make it easier for users in Europe to set up their default apps.

This preview build also introduces various fixes for File Explorer, the Start menu, and other areas. Of course, this is in addition to known issues.

At the time, Microsoft was also rolling out Windows 11 build 26120.4520 (KB5060834) in the Beta Channel, with the same improvements, but with the difference that these changes are available for version 24H2.

What’s new on Windows 11 build 26200.5670 (Dev)

These are the new features and fixes coming to Windows 11 25H2:

Passkeys with 1Password support

Starting with this release, Microsoft is taking another step toward eliminating passwords on Windows 11 with the seamless support for plugin-based passkey managers, with 1Password (beta) as the first integrated provider.

This means you can now store and use passkeys directly through 1Password and log in using Windows Hello (face, fingerprint, or PIN).

If you want to try this feature, you’ll need to install the 1Password (beta) on your computer. Then, in Settings > Accounts > Passkeys > Advanced options, you’ll need to enable the plugin.

Once you have done this configuration, you can use your existing passkeys saved to the plugin credential manager or save new passkeys.

Default apps settings

This update enhances the process of setting default browsers and file associations on Windows 11. For example, moving forward, more file types and link types can now be set as default through the “Set Default” button, making it easier to customize file associations.

Additionally, a new option allows you to set your preferred browser as the default application for opening PDF files with a single click.

Administrator Protection (hidden)

As part of this release, the company seems to have quietly backported the Administrator Protection (via @PhantomOfEarth) feature to the Dev and Beta Channels, and if the protection is turned on, Task Manager will include an option to elevate the application.

On Windows 11, Administrator Protection is a new security feature that enhances the safety of administrator accounts. Instead of your primary admin account always having full permission, it now runs with standard user permissions by default.

When an administrative task is required (such as installing an app), the operating system creates a temporary, isolated administrative session. This “just-in-time” approach means your main account is protected, and malicious software has a much harder time gaining or holding onto administrative control. All elevated actions now require explicit user authentication, often through Windows Hello, enhancing security and user awareness. This new system also fixes many common UAC bypass vulnerabilities.

Other fixes and changes

Microsoft’s latest build also delivers some additional fixes and changes:

• File Explorer: Resolved crashes tied to the Home page, restored missing pinned thumbnails, and fixed view persistence issues, including desktop icons.
• Start menu: Cleaned up duplicate folder entries and smoothed out folder expand animations.
• Input: Addressed a major ctfmon.exe crash impacting keyboard input reliability.
• Lock Screen: Fixed a memory leak related to slideshow backgrounds, improving long-term performance.
• System: Dialogs now better support text scaling, and boot sound regression (Vista chime) has been corrected.

Additionally, the company is temporarily disabling Voice Access support for Japanese to address some problems, and it’s noting some known issues for the Start menu, Xbox Controllers, Click to Do, File Explorer, and Widgets.

Installation process

To download and install this Windows 11 build, enroll your device in the Dev and Beta Channel through the “Windows Insider Program” settings from the “Update & Security” section. Once you enroll the computer in the program, you can download the build from the “Windows Update” settings by turning on the “Get the latest updates as soon as they’re available” option and clicking the “Check for Updates” button.