Learn how to tell if your Office software is genuine. To help determine if your Microsoft software is genuine, go to our How to Tell site for more information. Here you'll learn about authentic packaging, including what to look for with product key labels, and Certificate of Authenticity (COA), how to report counterfeit software, and find out what your shopping and licensing options are.

Select Review activity to check for any unusual sign-in attempts on the Recent activity page.If you see account activity that you're sure wasn't yours, let us know and we can help secure your account—if it's in the Unusual activity section, you can expand the activity and select This wasn't me.If it's in the Recent activity section, you can expand the activity and select Secure your account.

注意: 在Windows中获取驱动程序更新的最佳和最安全的方法始终是通过Windows 更新。如果在Windows 更新时遇到问题，则可能会看到 Update Windows 中的任何链接是否可帮助你先解决问题。

如果“输入密码”窗口仍处于打开状态，请选择“忘记密码？. 如果没有，请选择下面的“重置密码”，输入要重置的帐户的用户名，然后选择“ 下一步”。 重置密码

The exception to this is if you turn off the setting that disables all non-essential connected experiences. The service that roams your privacy settings across devices is also turned off by that switch, so when that setting is off your settings will not roam to, or from, that particular device.

通过使用一组有限的文件和驱动程序，安全模式可使 Windows 在基本状态下启动。 如果在安全模式下没有出现问题，你就会知道默认设置和基本设备驱动程序不是导致此问题的原因。

扩展或加载项是自定义浏览器体验并为你提供更多控制权的简单工具。 下面介绍如何在 Microsoft Edge 中添加、关闭和删除扩展或加载项 。

Important: Reactions are only available to individuals using a work or school account in Outlook with a qualifying Microsoft 365 subscription.

Try these steps if you’re having trouble buying apps, games, or downloads from the Microsoft Store.

Focus is a new feature in Windows 11 that helps you minimize distractions. To help you stay on track, it integrates with the Clock app with features like a focus timer and music integration.