Protect your Android, iPhone, Mac, and Windows devices from threats by installing Microsoft Defender. Download Microsoft Defender on your devices either by: Scanning the following QR code Searching for Microsoft Defender in your app store Sharing with your devices, the following link: Copy link We encourage you to install Microsoft Defender on at least five devices per person. Ready to give it ...

If you think your Microsoft account has been hacked, find out how to secure your account and check for unauthorized activity.

Learn how to manage your Microsoft account security info and troubleshoot verification code issues.

了解如何添加安全信息以便保护你的 Microsoft 帐户。

Learn how to manage your Microsoft devices. Add, remove, register, or rename a device on your Microsoft account.

Important: You don't need to remove old security information unless there is an account security risk (e.g. someone else has access to your old mailbox). If you do need to replace your security information, make sure you add new information first. If you request removal of all security information in your account, the account is put into a restricted state for 30-days. Your information doesn't ...

如果我的代码来自其他区域，该怎么办？ 某些数字代码适用于可能与帐户上的区域设置不匹配的特定国家/地区。 如果你的帐户与你的物理区域匹配，并且你的代码是从你所在地区的零售商处购买的，请确保设备上的区域也与你的物理位置匹配。 若要从 Xbox 主机执行此作，请执行以下作：

了解如何修复错误“抱歉，Microsoft帐户出现问题”，以便登录到 Xbox 网络。

Get answers to some basic questions about what two-step verification is, and how to set it up and use it to help keep your Microsoft account more secure.

Learn how to add all your different accounts to the Microsoft Authenticator app.