Microsoft released new preview builds across three Windows Insider channels. The Dev and Beta channels (Builds 26300.8142 and 26220.8138, both based on Windows 11 25H2) introduce the most notable changes: continued rollout of Administrator Protection—a new security feature that limits what admin accounts can do by default—plus Task Manager improvements for monitoring the Neural Processing Unit (NPU) and a new touchpad setting. The Canary Channel receives Build 29558, which primarily introduces Windows Console Host improvements but also includes other fixes.

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Google Project Zero researcher James Forshaw discovered nine critical vulnerabilities in Windows 11's Administrator Protection feature during its preview phase in late 2025. The feature was disabled after its initial preview release in October 2025, but before the planned general availability rollout.

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