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

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.

Get info on how to sign up for, extend, or check the latest offers on subscriptions on your Xbox console.

获取与管理你的 Xbox 订阅、帐单问题等有关的详细信息。

Learn how to install, reinstall, or activate Microsoft 365 or Office 2024 on a PC or Mac.

Learn how to redeem Xbox prepaid codes for games, subscriptions, and digital content, and enjoy endless surprises with your Xbox account.

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.

You can only redeem a subscription code in the country where it was purchased. Find out more here.

如何获取 Microsoft 365 Microsoft 365 是一项订阅服务，可确保始终拥有来自 Microsoft 的 365 个应用Microsoft。 使用Microsoft 365 家庭版或Microsoft 365 高级版，最多可以与其他五个人共享订阅，在所有设备上安装 Microsoft 365，并同时登录到五个人。 这意味着，无论身在何处、使用何种设备，无论是电脑、Mac、平板 ...

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