Learn about Windows service packs and download the latest updates for Windows 10 and Windows 8.1

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。 通过检查管理员上方是否显示电子邮件地址，确认管理员帐户也是你的 Microsoft 帐户。 如果显示了电子邮件地址，则这是 Microsoft 帐户。

了解如何使用截图工具捕获屏幕上任何对象的屏幕截图或截图，然后批注、保存或共享图像。 在“截图工具”中，选择“模式”。 在早期版本的 Windows 中，选择“ 新建”按钮旁边的箭头。 接下来，选择所需的截图类型时，将看到整个屏幕略微更改为灰色。

Get the steps for showing your favorites bar in Microsoft Edge and Internet Explorer 11.

Get the steps for turning Windows Defender Firewall on or off.

Learn how to recover files that have been lost, deleted, or accidentally changed.

While setting up the Phone Link app, you'll be prompted to enable access to your phone's messages.

Decide which documents to recover from an unexpected close, delete recovered files you don't want, or close recovered files to review later.

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.

Learn how to earn Microsoft Rewards points when you browse the web with Microsoft Edge, search on Bing.com, and more.