A product key is a 25-character code that's used to activate Windows and helps verify that Windows hasn't been used on more PCs than the Microsoft Software License Terms allow.

Contact Microsoft Support. What's new. Surface Pro; Surface Laptop; Surface Laptop Studio 2

Learn how to use the cloud-based clipboard in Windows, share clipboard items across your devices, and pin items to your clipboard menu.

Fresh Start in Windows 10 lets you perform a clean reinstallation and update of Windows while keeping your personal data and most Windows settings intact.

若要在Windows 11电脑上使用移动应用，需要安装Amazon Appstore。 设置完成后，你将能够浏览和安装精选目录中的移动应用。

Learn how to use your Outlook inbox effectively with Microsoft Support's training resources.

The Microsoft Mouse and Keyboard Center is an app that helps you make the most out of your Microsoft keyboard and mouse. Mouse and Keyboard Center helps you personalize and customize how you work on your PC.

Learn about the recovery options in Windows. Find out how to reset your PC, go back to a previous version of Windows, or use media to reinstall Windows.

Learn how to open, navigate, and troubleshoot File Explorer in Windows, with answers to common questions and support assistance.

如何激活预安装在新 Windows 10 计算机上的 Office 或使用新的产品密钥。