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.

Find solutions for Xbox account and profile issues, manage settings, and get support for your Xbox experience.

Windows 安全启动证书过期 重要提示： 大多数 Windows 设备使用的安全启动证书从 2026 年 6 月开始过期。 若未能及时更新，这可能会影响某些个人和企业设备安全启动的能力。 为避免中断，建议查看指南并提前采取措施更新证书。 有关 Windows 设备的详细信息和准备步骤，请参阅 Windows 安全启动证书 ...

降级订阅： Game Pass Ultimate 和 Game Pass Premium 可以降级到较低级别的订阅。 降级时，不会立即收费。 你当前的订阅将持续到下一个续订日期，然后变更为新订阅等级，并在该日期收取新订阅费用。

This article provides the latest information and status for known issues in Windows or Microsoft Intune related to Secure Boot certificates. For problems deploying Secure Boot certificates that are not caused by known issues in Windows or Microsoft Intune, please refer to the Secure Boot troubleshooting guide. In this article Known issues when deploying Secure Boot certificates Secure Boot ...

了解如何修复错误 0x800705b4，以便在更新应用后可以启动 Xbox One 游戏或应用。

Summary This article explains how to run older apps and programs on the latest version of Windows by fixing common compatibility issues. With each new version of Windows, users often experience compatibility issues with older apps or programs. This guide explains why such issues occur and provides practical solutions to address them. Why do apps become incompatible Apps can become incompatible ...

检查 Xbox 服务、游戏和应用是否有任何服务中断。

Hotfix update for Microsoft Exchange Server 2019 CU15 HU2 was released on May 29, 2025. It includes fixes for nonsecurity issues and introduces new features. These fixes and features will also be included in later cumulative updates for Exchange Server 2019.

Check the Xbox services, games, and apps for any service outages.