Summary A BitLocker recovery key is needed when BitLocker can’t automatically unlock an encrypted drive in Windows. This is a 48‑digit number that lets you regain access to your drive.

Learn how to prevent unauthorised purchases on your Xbox by creating Microsoft accounts for every person who uses that console.

Learn how to find a Windows product key for activation, and when you'll use a digital license instead.

升级订阅： Game Pass Essential、Game Pass Premium、Game Pass for Console、PC Game Pass 和 EA Play 都可以升级到更高级别的 Game Pass 订阅。 升级时，你将立即被收取新订阅费用，当前订阅的预付时间将转换并应用到新订阅中。 有关此转换的详细信息，请转到： 关于 Xbox Game Pass 转换的所有信息

Microsoft Support is here to help you with Microsoft products. Find how-to articles, videos, and training for Microsoft Copilot, Microsoft 365, Windows 11, Surface, and more.

If you see error 0x8015DC0B, it means that some services are no longer available in all regions.

This page provides support links for home users and support phone numbers for business users.

了解 Xbox 云游戏在 Android、Apple 和 Windows 设备以及 Xbox 主机与智能电视上如何运行的工作原理。

If your camera stops working, it can disrupt video calls, online meetings, and other activities that rely on camera. Common causes include missing drivers after a recent update, antivirus software blocking the camera, restrictive privacy settings, or issues with the app you're trying to use. This article provides a step-by-step guide to help you troubleshoot and resolve camera problems ...

如果您移至新的國家/地區，在購買之前，請確定您的帳單地址和付款選項符合您的新地區。