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Sign in to Microsoft 365 | Microsoft Support
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
Contact - Microsoft Support
Support for Office 2021 will end on October 13, 2026. Learn more about your options for Office.
查找你的 Windows 产品密钥 | Microsoft Support
了解如何查找用于激活的 Windows 产品密钥，以及何时改用数字许可证。
Applies To:
Microsoft account dashboard
解决 Windows 上的 Game Bar 问题 | XBOX Support
尝试为游戏选择其他显示选项，例如无边框窗口。 游戏可能阻止了自定义键盘快捷方式。 请参阅下面的“为什么我的键盘快捷方式对 Game Bar 不起作用？” 部分。 少数计算机和配件不支持 Windows 徽标键。 有关详细信息，请查看设备制造商的网站。 如果键盘上未内置 Windows 徽标键，则创建一个自 ...
重置忘记的 Microsoft 帐户密码 | Microsoft Support
另请参阅 如果这些步骤不起作用，或者你遇到其他帐户登录问题，请使用我们的 登录帮助程序工具。 Microsoft 帐户安全信息和验证代码 如何帮助保护 Microsoft 帐户的安全 更改或重置 Windows 密码 访问去世用户的帐户 需要更多帮助吗？ 无法登录？ 如果无法登录到Microsoft帐户，大多数问题都可以通过 ...
Applies To:
Microsoft account dashboard
适用于电脑的游戏服务修复工具 | XBOX Support
如果在电脑上安装或更新游戏服务时遇到问题，或者你注意到电脑版 XBOX 应用启动时缺少内容，则可能需要下载并运行适用于电脑的游戏服务修复工具。
XBOX Update Preview Release Notes | XBOX Support
Hey XBOX Insiders! We are releasing a new XBOX Update Preview to the Alpha Skip-Ahead ring today. Continue reading below to learn all about what's included with this update.
Request a refund for digital games | XBOX Support
Find out how to submit a request for a refund for a purchase of digital XBOX content.
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。