Use the Information Protection viewer to view protected files in Windows, Android, iOS, or Edge.

Find everything you need to manage your Microsoft account, Xbox profile, and more.

If you see error code 0x800704c6, it means that there's a service issue, or that you need to troubleshoot your network connection. Find out how here.

在 Android 设备上安装 Authenticator Google Play 商店在中国不可用，因此只能从以下商店下载Microsoft Authenticator： 联想 Oppo – 搜索要从 Oppo 存储区下载Microsoft Authenticator。 三星

Learn how to identify and open encrypted and protected emails no matter what email client you're using.

The Program Install and Uninstall troubleshooter helps you automatically repair issues when you're blocked from installing or removing programs.

This security update includes fixes and quality improvements that are part of the following updates: January 13, 2026—KB5073724 (OS Builds 19045.6807 and 19044.6807) January 17, 2026—KB5077796 (OS Builds 19045.6811 and 19044.6811) Out-of-band January 24, 2026—KB5078129 (OS Builds 19045.6812 and 19044.6812) Out-of-band The following is a summary of the issues that this update addresses ...

Xbox Support ... Xbox Support

Learn how to use mobile operator billing as a payment option to buy Xbox subscriptions, games, and other content.

本文中的信息仅在中国提供。 我们很高兴地向你推出荣耀、三星和 OPPO 特定设备上的“手机连接”！ 使用“手机连接”，可以轻松连接手机和电脑，以查看和回复短信、拨打和接听电话、查看和管理照片、接收移动通知，以及直接在电脑上使用手机屏幕。 将荣耀、三星或 OPPO 设备连接到电脑后 ...