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 out how to submit a request for a refund for a purchase of digital Xbox content.

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

If you're trying to buy a game or an add-on using your Microsoft account balance, you may not have enough funds in your account to cover the total cost of the item. For example, if you try to buy a game that's listed as $9.99, and you have a Microsoft account balance of $10.00, that amount wouldn’t be enough to cover the taxes, so you'd need to add more funds pay the total balance.

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

如何變更玩家代號？ 我們已將新的 Xbox 玩家代號更新為支援最多 12 個字元的 Unicode 玩家自選名稱，而此名稱還會在您分享玩家代號時加上自動產生的尾碼。 我們為玩家提供 13 個不同的字母系統，支援全球超過 200 種語言。

How to create or edit your Outlook signature for email messages. Include your signature, text, images, electronic business card, and logo.

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。

Download Microsoft Authenticator Microsoft Authenticator is a mobile app that helps you sign in to all your accounts without using a password.

注册设备 登录到 account.microsoft.com 选择“设备”。 在此处，可以查看链接到你的Microsoft 帐户的所有 Xbox 和 Microsoft 设备。 选择页面顶部的“注册设备”，以开始将新 Xbox 主机或配件链接到帐户的过程。 选择“注册新设备”。 如果已使用此 Microsoft 帐户登录到新设备，则该设备可能会显示在此选项下 ...