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.

如果麦克风功能出现问题，则以下信息可以帮助你排除故障和解决问题。 确保应用有权访问麦克风. 如果在更新 Windows 10 后未检测到麦克风，则表示你可能需要先授予应用相关权限才能使用它。

Important: Workbook links are considered potentially unsafe and must be enabled when you open a formula workbook.When you open a formula workbook, click Enable Content in the Message Bar to allow the workbook links to function. If you don't, Excel keeps the most recent values and disables refreshing the links with values from the data workbook.

In the Background apps permissions section, under Let this app run in the background, select one of the following options: Always—The app runs in the background, receiving info, sending notifications, and staying up-to-date even when you're not actively using it.This option may use more power.

Sign in using two-step verification or security info; Create app passwords in Security info (preview) Set up a phone call as your verification method

If you selected the Show icon on my profile check box but the icon still isn’t displaying, sign out of the device where you have the issue and then sign back in. On a PC, you may also be required to restart the app: Start Task Manager, choose the app that’s running (Game Bar or Xbox app), select End task, and then restart the app.

Find help and how-to articles for Windows operating systems. Get support for Windows and learn about installation, updates, privacy, security and more.

Windows 11 automatically downloads and installs updates to make sure your device is secure and up to date. This means you receive the latest fixes and security updates, helping your device run efficiently and stay protected.

Discover the latest updates for Windows 10, including improvements and fixes, known issues, and guidance on how to get the update.

When you start a focus session, a focus timer will appear on screen. To use additional focus tools in the Clock app, expand the focus timer to get the full view of the Clock app.