Announcing Windows 11 Insider Preview Build 26120.670 (Dev Channel)

Hello Windows Insiders, today we are releasing Windows 11 Insider Preview Build 26120.670 (KB5037869) to the Dev Channel.

REMINDER: Windows Insiders in the Dev Channel will now receive updates based on Windows 11, version 24H2 via an enablement package (Build 26120.xxxx). For Insiders in the Dev Channel who want to be the first to get features gradually rolled out to you, you can turn ON the toggle (shown in the image below) to get the latest updates as they are available via Settings > Windows Update. Over time, we will increase the rollouts of features to everyone with the toggle turned on. Should you keep this toggle off, new features will gradually be rolled out to your device over time once they are ready.

Going forward, we will document changes in Dev Channel builds in two buckets: new features, improvements, and fixes that are being gradually rolled out for Insiders who have turned on the toggle to get the latest updates as they are available and then new features, improvements, and fixes available to everyone in the Dev Channel.

Changes and Improvements gradually being rolled out to the Dev Channel with toggle on*

[General]

• This update includes a small set of general improvements and fixes that improve the overall experience for Insiders running this build on their PCs.

Fixes for everyone in the Dev Channel

[Other]

• Fixed an issue where the Network Locations header was missing in the This PC section of File Explorer.
• This update affects next secure record 3 (NSEC3) validation in a recursive resolver. Its limit is now 1,000 computations. One computation is equal to the validation of one label with one iteration. DNS Server Administrators can change the default number of computations. To do this, use the registry setting below.
  • Name: \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DNS\Parameters\
    MaxComputationForNsec3Validation
  • Type: DWORD
  • Default: 1000
  • Max: 9600
  • Min: 1

• This update addresses an issue that might affect domain controllers (DC). NTLM authentication traffic might increase.
• This update addresses an issue that affects the installation of a Windows update. It fails to complete. This occurs when you have to restart your device more than once.
• This update addresses an issue that might affect Virtual Secure Mode (VSM) scenarios. They might fail. These scenarios include VPN, Windows Hello, Credential Guard, and Key Guard.

Known issues

[Widgets]

• The WIN + W keyboard shortcut may not work correctly to open the Widgets board.

Reminders for Windows Insiders in the Dev Channel

• Updates released to the Dev Channel are based off Windows 11, version 24H2.
• Features and experiences included in these builds may never get released as we try out different concepts and get feedback. Features may change over time, be removed, or replaced and never get released beyond Windows Insiders. Some of these features and experiences could show up in future Windows releases when they’re ready.
• Many features in the Dev Channel are rolled out using Control Feature Rollout technology, starting with a subset of Insiders and ramping up over time as we monitor feedback to see how they land before pushing them out to everyone in this channel.
• Some features in active development we preview with Windows Insiders may not be fully localized and localization will happen over time as features are finalized. As you see issues with localization in your language, please report those issues to us via Feedback Hub.
• Windows Insiders in the Dev Channel who want to be the first to get features gradually rolled out to you*, you can turn ON the toggle to get the latest updates as they are available via Settings > Windows Update. Over time, we will increase the rollouts of features to everyone with the toggle turned on. Should you keep this toggle off, new features will gradually be rolled out to your device over time once they are ready.
• Because the Dev and Beta Channels represent parallel development paths from our engineers, there may be cases where features and experiences show up in the Beta Channel first.
• Check out Flight Hub for a complete look at what build is in which Insider channel.
• Copilot in Windows** in preview is being rolled out gradually to Windows Insiders in select global markets. The initial markets for the Copilot in Windows preview include North America, United Kingdom and parts of Asia and South America. It is our intention to add additional markets over time.

Thanks,
Amanda & Brandon