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

Learn about HDR capabilities in Windows 11 to bring a wider range of colors and details to your display.

Get help and support for Microsoft Edge. Find Microsoft Edge support content, how-to articles, tutorials, and more.

See how to arrange all your open windows using the mouse, keyboard, or the Snap Assist feature in Windows.

Learn how to recognize Internet connection problems and help improve your computer's online performance.

Find out the steps you can take if you receive a message telling you a driver can't load on your device.

With Microsoft Edge, you can turn on sync to browse the web on all your devices, keep your favorites organized, and more.

Learn why it's important to have a backup, and how Windows Backup can help you keep your files and settings safe.

Find Microsoft Excel help and learning resources. Explore how-to articles, guides, training videos, and tips to efficiently use Excel.