我的产品密钥不起作用. 如果 Office 产品密钥不起作用，或已停止工作，应与卖家联系，申请退款。 如果产品密钥是独立于软件购买的，则很可能是被盗的产品密钥，或者是以欺骗方式获得随后阻止使用的产品密钥。

Find out how to turn on Game Mode while playing a game on your Windows 10/11 device.

My Computer is now This PC. Find it. To get to This PC in Windows 10, open File Explorer from the taskbar and select This PC in the left pane.. Pin it to Start

Learn how to record or create macros and execute them using buttons or keyboard shortcuts in Microsoft Office applications.

Learn how to use eye control in Windows to type with an on-screen keyboard, communicate with people, and control the mouse with your eyes.

Look for NAT Type.If the status says Teredo is unable to qualify, it means your PC is unable to obtain a Teredo IP address.

Training: Get started with SharePoint in Microsoft 365. At office.com, sign in to SharePoint, then select the SharePoint tile.

了解 Windows 中的恢复选项。 查明如何重置电脑、回退到以前版本的 Windows 或使用介质重新安装 Windows。

Microsoft is retiring the Windows legacy inbox Troubleshooters, such as Keyboard troubleshooter and Speech troubleshooter, and the Microsoft Support Diagnostic Tool (MSDT) that runs them.

获取有关 Windows 安全的帮助; 在 Microsoft Edge 中查看和删除浏览器历史记录; 删除和管理 Cookie; 重新安装 Windows 时安全移除有价值的内容