Learn how to check for, download, and install KB 2919355, an update for Windows 8.1 and Windows RT 8.1.

Learn how to log in to Microsoft Teams with your Microsoft 365 account. This step-by-step guide from Microsoft Support walks you through the process of accessing Teams on desktop, web, and mobile devices.

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

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。

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

Learn how to download files from the web, change your default download location, and find files you've downloaded on your PC using Internet Explorer.

Learn how to manage and set device screen time limits on Windows, Xbox, and mobile devices connected through the Microsoft Family Safety app.

Troubleshooting steps for the calling feature of the Phone Link app.

Learn how to log in to Microsoft Teams using our step-by-step guide. Stay connected with your team and start collaborating!

Learn how to access and manage your Windows sign in options. Use a password, Windows Hello, or a security key to unlock your device.