Learn how to add, change, or remove ways to sign in or verify your Microsoft account. Find out how to get verification codes by email, phone, or app, and how to troubleshoot verification code issues.

Learn how to use a FIDO2-compliant security key to sign in to your Microsoft account instead of your password. Find out how to add, manage, and delete security keys, and what types of keys are available.

Learn how to buy games or apps with your Microsoft account balance, and how to pay a past-due balance or redeem a gift card. Find out how to manage your funds and update your payment method on the Payment & billing tab.

Learn how to check the recent sign-in activity for your Microsoft account and what to do if you see unusual or suspicious activity. Find out how to change your password, update security settings and contact support.

Learn how to turn off recurring billing and get a refund for your Xbox subscription on console or web. Check the terms and conditions, troubleshoot issues, and contact support if needed.

Xbox Game Pass Core conversion ratio: Any remaining time will convert to Xbox Game Pass Ultimate time at a ratio of 2:1 and be rounded up to the next full day.For example, 90 days remaining of Xbox Game Pass Core will convert to 45 days of Xbox Game Pass Ultimate time.

Learn how to encrypt a drive or drives on a Windows device using BitLocker Drive Encryption. Find out how to access, enable, and manage BitLocker Drive Encryption using the Control Panel.

了解如何兑换礼品卡、代码或 Office 产品密钥，以及如何在 Microsoft Store 在线商店、Windows 或 Xbox 上花费余额。

了解如何兌換禮品卡、代碼或 Office 產品金鑰，以及如何在 Microsoft Store 線上、Windows 或 Xbox 上支付餘額。

通常，如果购买的是实物 Windows 拷贝，产品密钥应该在标签上或者在 Windows 随附包装盒中的卡上。 如果 Windows 已预先安装在计算机上，产品密钥应显示在设备标签上。