Microsoft has launched an initial test version of Windows 11 26H2 for participants in the Dev Channel of its Insider program. This upcoming significant feature release for the OS introduces genuine advancements, setting it apart from the 26H1 update.
The build number for this version is 26300.7674, and information within the update details confirms that the full rollout will utilize an enablement package approach.
Such packages activate capabilities already embedded in the system that were held back earlier, resulting in a compact download size that avoids the need for full system reinstalls or major upgrades. The company used a similar method for the Windows 11 25H2 release previously.
Reports from Windows Latest note that the label 'Windows 11 26H2' does not yet show up in the OS version details accessible via Settings or the winver tool in Command Prompt. It is visible solely in the Windows Update area listing installed updates, provided users are Insiders who have applied this build.
The company has yet to disclose the precise additions for Windows 11 26H2, though current test builds offer hints. Notably, trials include a Copilot conversation interface within File Explorer, with the AI tool expected to appear in the Explorer's side panel.
Integration of Copilot into the taskbar's Windows Search function seems probable as well. These AI elements are anticipated to remain opt-in features rather than active by default, according to Windows Latest analysis. Additionally, Copilot is being incorporated into the notification area of Windows 11.
Test builds also reveal experiments with an updated Run dialog, involving changes that extend beyond aesthetics to potentially include fresh functionalities.
The Windows 11 26H2 update is slated for October 2026, aligning with the standard timing for annual autumn releases. Like the October launch of 25H2, it will follow an official announcement with a phased distribution to eligible devices.
In contrast, Windows 11 26H1 is due in spring 2026 but lacks feature enhancements; it primarily ensures support for Qualcomm's Snapdragon X2 chip and potentially additional Arm-based hardware.