IT之家 9 月 29 日消息，Windows Latest 今日发现，微软 Win11 26H2 年度能力更新已进入发布前最后阶段，安装镜像中最核心的 ESD 文件已浮现在微软内部服务器中（对应版本号为 Build 26300.9457），这通常意味着微软可能在将来数天甚至接下来几个小时正式启动推送。
Windows 11 26H2 是微软面向 2026 年推出的年度能力更新，但这次更新并未带来面向普通消费者的新能力，总体更偏向稳定性与企业管理能力的改进，感兴趣的使用者可借助安装启用包提前升级到 26H2。
对于企业版使用者，设备将默认启用两项关键能力。其中，Point-in-time Restore（平台时间点恢复能力）将在所有 PC 上默认启动，当平台浮现难题时，可将 Windows 回滚到此前的状态。
另一项变化是 Windows Settings Backup（此前名为 Windows Backup for Organizations）也将默认在企业设备上启用，用于备份组织管理下的 Windows 设置，便于设备恢复或迁移。
ESD 全称为 Electronic Software Distribution，是微软用于分发 Windows 安装镜像的压缩格式，也是 Media Creation Tool 创建安装 U 盘或 ISO 镜像时所使用的底层文件之一。
不过，普通使用者无法直接从微软下载 ESD 文件。官方仅给出 ISO 镜像等安装介质，而 ESD 更多是微软内部打包和生成安装媒体的组成部分，若想直接使用 ESD 升级平台，通常需要借助第三方工具。
微软此前曾在工艺文档中说明，当 Windows 新版本准备发布时，最终代码会完成构建、打包，并借助 ISO 镜像、Windows Update 能力更新包等多种渠道开展交付。
简体中文商业版：
http://dl.delivery.mp.microsoft.com/filestreamingservice/files/977e1020-1efa-4057-a0c1-d763a562776b/26300.9457.260913-1737.26h2_ge_release_svc_refresh_CLIENTBUSINESS_VOL_A64FRE_zh-cn.esd
http://dl.delivery.mp.microsoft.com/filestreamingservice/files/9b473268-ae5f-44a2-86d9-586af4c7bce4/26300.9457.260913-1737.26h2_ge_release_svc_refresh_CLIENTBUSINESS_VOL_x64FRE_zh-cn.esd
简体中文消费者版：
http://dl.delivery.mp.microsoft.com/filestreamingservice/files/8949468f-a841-4160-aaa7-ef2a9cb1f749/26300.9457.260913-1737.26h2_ge_release_svc_refresh_CLIENTCONSUMER_RET_A64FRE_zh-cn.esd
http://dl.delivery.mp.microsoft.com/filestreamingservice/files/79f6dea5-67d3-4861-94ab-0aaa9d006847/26300.9457.260913-1737.26h2_ge_release_svc_refresh_CLIENTCONSUMER_RET_x64FRE_zh-cn.esd
家庭中文版（OEM 预装）：
http://dl.delivery.mp.microsoft.com/filestreamingservice/files/2752553b-abca-4e7e-8810-42593139dcfe/26300.9457.260913-1737.26h2_ge_release_svc_refresh_CLIENTCHINA_RET_x64FRE_zh-cn.esd
x64 版本 25H2 启用包（KB5121794）：
https://catalog.sf.dl.delivery.mp.microsoft.com/filestreamingservice/files/ad9dbefc-fd26-4e9f-80cf-16743b6c4faa/public/Windows11.0-KB5121794-x64_870a6b16d4e0e0eeeaa02b5306df5b4ecb39f563.msu
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Thanks to IThome user Oulu for the tip!
IThome, September 29: Windows Latest today discovered that Microsoft's Windows 11 26H2 Annual Feature Update has entered the final pre-release stage. The most core ESD files in the installation image have appeared on Microsoft's internal servers (corresponding to build version 26300.9457), which typically means Microsoft may officially start the push in the coming days or even in the next few hours.
Windows 11 26H2 is an Annual Feature Update released by Microsoft for 2026. However, this update does not bring new capabilities for ordinary consumers; overall, it focuses more on improvements to stability and enterprise management. Interested users can use the Enablement Package to upgrade to 26H2 in advance.
For Enterprise Edition users, two key capabilities will be enabled by default on their devices. Among them, Point-in-time Restore (Platform Point-in-Time Recovery capability) will be enabled by default on all PCs. When the platform encounters issues, Windows can be rolled back to a previous state.
Another change is that Windows Settings Backup (formerly known as Windows Backup for Organizations) will also be enabled by default on enterprise devices. It is used to back up Windows settings under organizational management to facilitate device recovery or migration.
ESD stands for Electronic Software Distribution. It is a compressed format used by Microsoft to distribute Windows installation images and is one of the underlying files used when the Media Creation Tool creates an installation USB drive or ISO image.
However, ordinary users cannot directly download ESD files from Microsoft. The official source only provides installation media such as ISO images, while ESD is more of a component of Microsoft's internal packaging and generation of installation media. If one wants to directly use ESD to upgrade the system, they typically need to use third-party tools.
Microsoft previously explained in its process documentation that when a new version of Windows is ready for release, the final code will be built, packaged, and delivered through various channels, including ISO images and Windows Update feature update packages.
Simplified Chinese Commercial Edition:
Simplified Chinese Consumer Edition:
Chinese Home Edition (OEM Pre-installed):
x64 Edition 25H2 Enablement Package (KB5121794):