了解如何升级或降级 Xbox Game Pass 或 EA play 订阅级别。

Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.

When someone illegitimately gains something that we worked hard to earn, it's unfair. Likewise, cheating devalues the enjoyment and competition on the Xbox network. In some cases, it can even create security risks for yourself, other players, and the service.

Protect yourself from phishing Phishing (pronounced: fishing) is an attack that attempts to steal your money, or your identity, by getting you to reveal personal information -- such as credit card numbers, bank information, or passwords -- on websites that pretend to be legitimate. Cybercriminals typically pretend to be reputable companies, friends, or acquaintances in a fake message, which ...

获得 Xbox Insider XP 获得 Xbox 预览体验成员经验值有助于升级、解锁新的 Xbox 预览体验成员级别，并登上排行榜。 你可以通过完成任务和调查获取经验值。 有时，Xbox 预览体验成员经验值被用来确定您能否被选为预览体验成员，从而预览限定内容。

Sign in using Microsoft Authenticator Microsoft Authenticator helps you sign in to your accounts if you've forgotten your password, use two-step verification or multi-factor authentication, or have gone passwordless on your account.

Need help with an Xbox console, an Xbox game, or Xbox network? Find out how to get in touch with us.

Find out how to install the latest driver for your printer. If you recently upgraded Windows, your printer driver might need to be reinstalled.

了解如何管理 Xbox 訂閱及解決帳單問題，獲取詳細資訊以輕鬆處理相關事務。

Certificate authority (CA) A certificate authority is an entity similar to a notary public. It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired. Top of Page Digital signature assurances The following terms and definitions show what assurances are provided by digital signatures. Authenticity The signer is ...