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

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。

Using Authenticator as a way to sign in If you have turned on passwordless, two-step, or multi-factor authentication for your account, use the following steps to sign-in: Go to the site where you want to sign in. Enter your username at the sign-in prompt and select Next. Select Send notification.

Find out how to troubleshoot issues redeeming Xbox digital codes and gift cards.

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

Microsoft Rewards offers and redemption catalogs vary across regions. The following is a list of countries/regions in which Microsoft Rewards is currently available: Asia

Find out how to resolve your Xbox purchase error when you're trying to buy something from the Microsoft Store.

Microsoft is modernizing the activation experience for perpetual licenses. Beginning December 3, 2025, the traditional telephone-based product activation automation process has been moved from telephone to online. Customers will instead use the Product Activation Portal: Product Activation Portal The new digital workflow provides a more secure, reliable, and user‑friendly activation ...

Xbox 家庭组管理 PIN 可防止 Xbox 家庭组的成员覆盖家长控制，或在未经你许可的情况下以其他方式访问你的帐户。