Free. 免费锁屏提醒表示活动Microsoft 365 家庭版或个人订阅不与登录帐户相关联。. 只有 Word、Excel 和 PowerPoint 的免费 Web 版本可供使用。 若要在浏览器中访问这些应用，只需使用 Microsoft 帐户登录到 Microsoft365.com，并从应用启动器 选择所需的应用。. 免费试用Word、Excel 和 PowerPoint

At Microsoft, we're guided by our AI principles, our Responsible AI Standard, and decades of research on AI, grounding, and privacy-preserving machine learning.Data privacy and security is a key principle of responsible AI. We aim to help our customers use our AI products responsibly, sharing our learnings, and building trust-based partnerships.

Microsoft support is here to help you with Microsoft products. Find how-to articles, videos, and training for Microsoft Copilot, Microsoft 365, Windows, Surface, and more.

如果在从 Microsoft Store 购买应用、游戏或下载时遇到问题，请尝试以下步骤。

To check activation status in Windows 11, select the Start button, and then select Settings > System and then select Activation .. Your activation status will be listed next to Activation.. Check activation status in Settings. You'll see one of these activation status messages on the Activation page:

To increase security and performance, Windows 11 in S mode only runs apps from the Microsoft Store. If you want to install an app that isn't available in the Microsoft Store, or if you have Windows 10 Pro, Enterprise, or Education and want to upgrade to Windows 11, you'll need to permanently switch out of S mode.

探索 OneDrive支持、帮助和学习资源。 了解如何使用 OneDrive 保护重要文件、文档和记忆。

激活有助于验证你的 Windows 副本是否为正版，且未在超过 Microsoft 软件许可条款所允许数量的设备上使用。 如果无法激活激活Windows 11，激活疑难解答可以提供帮助。

始终了解与朋友、家人和协作者共享的内容始终是很好的。 OneDrive 可以轻松实现。 只需在 OneDrive.com 登录帐户，在左侧导航区域中，你将看到名为 “共享”的视图。 通过此视图，可以快速查看所有共享的内容，尤其是与其他人共享的内容。

First time, infrequent senders, or senders marked [External] - While it's not unusual to receive an email or Teams message from someone for the first time, especially if they are outside your organization, this can be a sign of phishing.Slow down and take extra care at these times. When you get an email or a Teams message from somebody you don't recognize, or that Outlook or Teams identifies ...