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。

If you already have an account signed in to OneDrive and you want to add or remove another account, you’ll do that in OneDrive Settings.

Learn how to reinstall Windows on your PC and how activation works after it's installed.

Find help and how-to articles for Windows operating systems. Get support for Windows and learn about installation, updates, privacy, security and more.

Learn how to manage background activity for apps to help save battery power in Windows.

Learn how to troubleshoot Windows Media Player errors. Explore resources for general help with Windows Media Player.

Learn how to use a health report in Windows Security to manage your device performance and keep your device secure.

Microsoft Support offers assistance for Microsoft products, including how-to articles, videos, and training for various software and devices.

Describes the required steps on both your PC and your mobile device for removing a device from the Phone Link app.

Learn how to design professional-looking presentations with Microsoft 365. Create high quality, customized slides in a few clicks with PowerPoint Designer.