Contact - Microsoft Support
Support for Office 2021 will end on October 13, 2026. Learn more about your options for Office.
Account & profile | XBOX Support
Find everything you need to manage your Microsoft account, XBOX profile, and more.
How to sign in to Hotmail | Microsoft Support
Hotmail is now Outlook.com. Learn how to sign in to access your Outlook.com, Hotmail, Live, or MSN email account.
Applies To:
Outlook.com
Get more help | XBOX Support
Need help with an XBOX console, an XBOX game, or XBOX network? Find out how to get in touch with us.
2026 年 7 月 18 日 - KB5121767 (OS 内部版本 26200.8894 和 26100.8894) 带外
此适用于 Windows 11 版本 25H2 和 Windows 11 版本 24H2 (KB5121767) 的带外 (OOB) 更新是累积更新。 它包括先前安全和非安全更新的所有改进，以及其他修补程序。 改进 此 OOB 更新包括以下改进： [系统性能] 此更新解决了影响有限数量的设备 (Intel IPF) 驱动程序的问题，该问题可能会导致安装最新 Windows 更新后 ...
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
查找 XBOX 主机的授权服务提供商 | XBOX Support
若要获得 XBOX 主机的亲自服务，您可以访问Microsoft授权服务提供商，以获取由受信任的专家使用正版Microsoft更换部件执行的优质服务。
請與我們連絡 | XBOX Support
需要 XBOX 主機、XBOX 遊戲或 XBOX 網路的協助嗎? 了解如何與我們連絡。
Microsoft 365 帮助和学习 | Microsoft Support
获取 Microsoft 365 的支持、帮助和学习资源。 使用 Microsoft 365 让你的生活井然有序、扩展你的创造力并保护重要信息。