了解如何使用产品密钥或数字许可证激活 Windows、检查激活状态，以及链接Microsoft 帐户。

Learn how to troubleshoot and fix problems setting up your email in Outlook.

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Learn how to find and install digital downloads from Microsoft Store. See instructions to download and install software directly purchased from Microsoft.

Learn how to turn on device encryption, or standard BitLocker encryption in Windows.

Learn how to locate and manage your app permissions on Windows devices. Some apps or games need specific permissions to work properly.

We're committed to delivering continuous innovation by releasing new features and enhancements into Windows 11 more frequently. Windows devices get new functionality at different times as Microsoft delivers non-security updates, fixes, improvements, and enhancements via several servicing technologies—including controlled feature rollout (CFR). ...

Training: Watch and learn how to use PowerPoint in Windows. Explore PowerPoint training guides, articles, and how-to videos.

Discover the latest features in Office 2021, including new ways to create content, manage data, and communicate effectively.

Learn what you can do if you're not receiving account aign-in verification codes.