As you browse the web, you'll see an icon in the address bar that indicates the security of the connection to the site you're visiting. This icon helps you determine if you can safely send and receive information from the site.

学习如何在 Windows 中解决 USB-C 问题，修复 USB 设备、端口和适配器无法正常工作。

You can refer to the contents of cells in another workbook by creating an external reference formula. An external reference (also called a link) is a reference to a cell or range on a worksheet in another Excel workbook, or a reference to a defined name in another workbook.

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Learn how to delete and restore files in OneDrive. Recover deleted files or folders from the OneDrive recycle bin.

If either of the categories above apply to you, use the following procedures to update your browser: Update once. In the browser, go to Settings and more > Help and feedback > About Microsoft Edge (edge://settings/help).. If the About page shows Microsoft Edge is up to date., you don't need to do anything.

Windows Hello. Windows Hello 可使你通过你的面部、虹膜、指纹或 PIN 登录到你的设备、应用、在线服务和网络。 即使你的 Windows 设备可以使用 Windows Hello 生物识别，也不必这么做。

Learn how to make items on the screen appear larger by using Magnifier in Windows.

Learn how to change the power mode on your Windows PC to preserve your battery, limit notifications, and background activity.

Change two-step verification settings; Common problems with two-step verification for work or school accounts; Manage app passwords for two-step verification