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

Find help and how-to articles for Windows operating systems. Get support for Windows and learn about installation, updates, privacy, security and more.

Select Notifications to expand it, and turn notifications, banners, and sounds on or off for some or all notification senders.

Important: You don't need to remove old security information unless there is an account security risk (e.g. someone else has access to your old mailbox).

New to Xbox gaming on PC? Here's how to get started.

Discover the latest updates for Windows 10, including improvements and fixes, known issues, and guidance on how to get the update.

Browse on the go with the new Microsoft Edge for Android and iOS devices. Microsoft Edge offers better protection and privacy, and can sync your favorites, passwords, and more across your desktop and mobile devices.

如果麦克风功能出现问题，则以下信息可以帮助你排除故障和解决问题。 确保应用有权访问麦克风. 如果在更新 Windows 10 后未检测到麦克风，则表示你可能需要先授予应用相关权限才能使用它。

Learn more about updates for Windows 10 version 1903, including improvement and fixes, any known issues, and how to get the update.

Download and install Skype for Business on your PC. Sign in to and out of Skype for Business. Set up an audio device for Skype for Business. Set up and troubleshoot Skype for Business video