Learn how criminals use fake order confirmations to trick you into giving them your personal information or downloading malware. See the clues to identify and avoid these scams, and what to do if you get one.

Learn how to use Microsoft Defender Antivirus to scan and remove malware from your PC. Follow the steps to run an offline scan, view the results, and take action against detected threats.

Learn how to identify and avoid fake Microsoft technical support calls or pop-ups that claim to offer help. Report any scams you encounter to help Microsoft stop cybercriminals.

准备好安装了吗？ 在开始之前，请确保电脑或 Mac 满足 系统要求。. 如果已兑换产品密钥，只需重新安装应用，或者知道你已通过工作或学校分配了许可证，则可以跳到 “登录”部分，下载并安装 Microsoft 365 或 Office。 但是，如果是 首次 安装 Microsoft 365 或 Office，可能需要先执行一些步骤。

如果这是你第一次安装 Microsoft 365，则可能需要先执行一些设置步骤。展开下面的 “了解详细信息”部分。 但是如果是重新安装 Microsoft 365，且已兑换了产品密钥并拥有与 Microsoft 365 相关联的帐户，请转到“登录并安装 Office”的部分。

Learn how to register your security info and mobile device to reset your work or school password if you forgot it or got locked out. Find out the common problems and solutions for password reset feature.

Learn about the latest features and fixes for Windows 11, version 23H2, released on 10/31/2023. Find out how to install the update, what's new in Copilot in Windows (in preview), Microsoft Teams (free), and more.

弹出窗口阻止程序无法阻止哪些弹窗？ 如果在启用此功能并且尝试了上面列出的解决方案后，网页中仍然显示了弹出窗口，则它们可能是网站广告，以弹出窗口的样子呈现。

Learn how to enable the toggle to get the latest non-security and feature updates for your Windows 11 device as soon as they become available. Find out what changes, improvements, and security updates are included in each update and how to check your update history.

Learn how to set up your email address as a verification method for password reset. Follow the steps to add, update, or delete your email account from the Security info page.