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Support for Windows 10 has ended on October 14, 2025. Learn more about your options for Windows 10.
更新 Windows 中的蓝牙驱动程序 | Microsoft Support
Windows 11 Windows 10 更新蓝牙驱动程序有助于解决连接、配对或检测问题。 使用以下步骤更新驱动程序。 使用 设备管理器 更新蓝牙驱动程序 选择“ 开始”，键入 “设备管理器”， 然后从结果中选择它。 展开 “蓝牙 ”以查看蓝牙设备和适配器的列表。 右键单击蓝牙适配器，然后选择“ 更新驱动 ...
Getting refunds for your purchase | XBOX Support
Learn how to request a refund for a purchase from the XBOX Store.
Account & profile | XBOX Support
Find everything you need to manage your Microsoft account, XBOX profile, and more.
2026 年 8 月 27 日 - KB5120998 (OS 内部版本 26200.9278 和 26100.9278) 预览版
此适用于 Windows 11 版本 25H2 和 24H2 (KB5120998) 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 ...
Sign in to SharePoint | Microsoft Support
Training: Get started with SharePoint in Microsoft 365. At office.com, sign in to SharePoint, then select the SharePoint tile.
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
打开“设备管理器” - Microsoft 支持
Microsoft 开发人员 Microsoft Learn 支持 AI 商城应用 Microsoft 技术社区 Microsoft Marketplace Microsoft Power Platform 软件公司 Visual Studio
下载并安装或重新安装 Office 2021、Office 2019 或 Office 2016
如果这是你 第一次 安装 Office，则可能需要先执行一些设置步骤。 展开下面的 “了解详细信息”部分。 但是如果是重新安装 Office，且已兑换了产品密钥并拥有与 Office 关联的帐户，请转到登录 以下载 Office 的部分。
Applies To:
Office 2021, Office 2021 for Mac, Office 2019, Office 2016, Office 2016 for Mac
与我们联系 | XBOX Support
需要有关 XBOX 主机、XBOX 游戏或 XBOX 网络的帮助?了解如何与我们联系。