2026 年 7 月 28 日 - KB5101684 (OS 内部版本 26200.8973 和 26100.8973) 预览版
此适用于 Windows 11 版本 25H2 和 24H2 (KB5101684) 的累积更新包括生产质量改进。 公告和消息 本部分提供与此版本相关的重要通知，包括公告、更改日志和终止支持通知。 Windows 安全启动证书过期 重要提示： 大多数 Windows 设备使用的安全启动证书从 2026 年 6 月开始过期。 在过去的几个月里，Microsoft 一直 ...
下载 Microsoft Authenticator | Microsoft Support
注意 Microsoft Authenticator 不 适用于电脑或 Mac，因为出于安全原因，验证器应用是专为智能手机设计的。 了解详细信息。 Microsoft 不再支持超过一年的 Authenticator 版本。 始终使设备保持最新。 中国用户应阅读 如何在中国下载和使用 Microsoft Authenticator。
Account & profile | XBOX Support
Find everything you need to manage your Microsoft account, XBOX profile, and more.
当你尝试在电脑上安装游戏时，会出现错误 0x80070422 | XBOX Support
了解如何修复错误代码 0x80070422，以便可以在 Windows 电脑上安装 XBOX 游戏。
Activate Windows | Microsoft Support
Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.
使用产品激活门户激活Microsoft永久产品 | Microsoft Support
新的数字工作流提供更安全、更可靠且用户友好的激活体验，并有助于防止欺诈。 虽然该过程已更新，但脱机激活功能仍受支持。 依赖传统脱机激活的客户可以继续使用它，而无需更改其环境。 产品激活门户支持对各种永久Microsoft产品进行激活，并支持连接和非连接的设备。 这种演变可确保激活 ...
Sign in to Microsoft 365
Learn how to sign in to Office or Microsoft 365 from a desktop application or your web browser.
Applies To:
Excel for Microsoft 365, Word for Microsoft 365, Outlook for Microsoft 365, PowerPoint for Microsoft 365, Access for Microsoft 365, OneNote for Microsoft 365, Project Online Desktop Client, Publisher for Microsoft 365, Excel for Microsoft 365 for Mac, Word for Microsoft 365 for Mac, Outlook for Microsoft 365 for Mac, PowerPoint for Microsoft 365 for Mac, OneNote for Microsoft 365 for Mac, Excel 2024, Word 2024, Outlook 2024, PowerPoint 2024, Access 2024, OneNote 2024, Project Professional 2024, Project Standard 2024, Visio Professional 2024, Visio Standard 2024, Office 2024, Excel 2024 for Mac, Word 2024 for Mac, Outlook 2024 for Mac, PowerPoint 2024 for Mac, OneNote 2024 for Mac, Office 2024 for Mac, Excel 2021, Word 2021, Outlook 2021, PowerPoint 2021, Access 2021, Project Professional 2021, Project Standard 2021, Publisher 2021, Visio Professional 2021, Visio Standard 2021, Excel 2021 for Mac, Word 2021 for Mac, Outlook 2021 for Mac, PowerPoint 2021 for Mac, OneNote 2021 for Mac, Office 2021 for Mac, Excel 2019, Word 2019, Outlook 2019, PowerPoint 2019, Access 2019, Project Professional 2019, Project Standard 2019, Publisher 2019, Visio Professional 2019, Visio Standard 2019, Excel 2016, Word 2016, Outlook 2016, PowerPoint 2016, Access 2016, OneNote 2016, Project Professional 2016, Project Standard 2016, Publisher 2016, Visio Professional 2016, Visio Standard 2016, OneNote for Mac, Microsoft 365 for home, Office 365 Small Business, Microsoft 365 admin, Project Online, Microsoft 365 for Mac, Project for Office 365
Find your Windows product key | Microsoft Support
Learn how to find a Windows product key for activation, and when you'll use a digital license instead.
Applies To:
Microsoft account dashboard
July 18, 2026—KB5121767 (OS Builds 26200.8894 and 26100.8894) Out-of ...
This out-of-band (OOB) update for Windows 11, version 25H2 and Windows 11, version 24H2 (KB5121767) is cumulative. It includes all improvements from previous security and non-security updates, along with an additional fix. Improvements This OOB update includes the following improvement: [System Performance] This update addresses an issue affecting a limited number of devices with an Intel ...
Download Microsoft Authenticator | Microsoft Support
The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.