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Windows 11 25H2, the operating system’s latest major feature update, rolled out just last month. Just a few weeks ago, rumors of a “26H1” release started circulating, and now we have confirmation of its existence: Microsoft has just released the first build of Windows 11 26H1 — Preview Build 28000 — in the Canary channel of the Insider Preview program.
26H1は現在テスト段階にあり、来年初めに正式にリリースされる予定です。このアップデートは、特定のサブセットのユーザーを対象としており、ARMであることを示唆する様々な報告があります。根拠のない噂が飛び交っており、次期Snapdragon X2 EliteとNvidia N1Xシステムが候補として挙げられています。クアルコムは、次期チップの発売を2026年初頭に予定しており、26H1のリリースに合わせているためです。.
Despite the implication, Microsoft doesn’t explicitly mention any names in its announcement, so this is all speculation. “26H1 is not a feature update for version 25H2 and only includes platform changes to support specific silicon. There is no action required from customers,” says the Redmont giant. That “specific silicon” phrasing is what has led many to believe it’s referring to Snapdragon and Nvidia’s upcoming chips.
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So far, Windows 11 has maintained an yearly release cadence; Microsoft pushes a single feature update in the second half of each year, adding new functionality and improvements to the OS. Therefore, the releases are named “22H2,” “23H2,” “24H2,” and so on. As such, 26H1 marks the first time the company has scheduled a major update for the start of the year, even if it’s just to add support for specific ARM silicon.
Despite Microsoft confirming that 26H1 brings no new features, it’s built on the new Bromine core — upgrading from the Germanium platform that powered Windows 11 25H2 and 24H2 — suggesting that once 26H1 is rolled into the eventual 26H2, it will be a substantial upgrade. Windows Insider also says that this Preview Build 28000 is the base RTM build for Windows 11 26H1, meaning マイクロソフト はこれをロックダウンし、OEM（おそらくクアルコムとNvidia）に送り、彼らがシステムにロードできるようにします。.
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