Important: If your device is out of support, it is no longer receiving security updates from Microsoft and may become more vulnerable to security risks and viruses.Therefore, we strongly recommend that you update to the latest version of Windows. Each version of Windows is supported for 18 months.

Windows Security provides built-in security options to help protect your device from malicious software attacks. To access the features described below, tap the Windows Start button, type windows security, select it from the results, and then select Device security.

可通过不同的方式删除应用和程序，因此如果找不到要查找的应用和程序，可以尝试另一个位置。 请注意，某些应用和程序内置于 Windows 中，无法卸载。

Tip: Also, refer to the Quick Reference Card: VLOOKUP troubleshooting tips which presents the common reasons for #NA issues in a convenient PDF file. You can share the PDF with others or print for your own reference.

Tip: If you encounter a problem on your Windows device, pressing the Windows logo key + F takes a screenshot, then opens the Feedback Hub app and automatically uploads the screenshot to the Feedback tab. Follow the on-screen instructions to detail the problem you've encountered.

Note To use many of the Xbox features within Game Bar, including Xbox Social features, you must have the Xbox app for Windows installed. To use Xbox Social features, sign in to Game Bar with your Microsoft account. Press the Windows logo key + G to open Game Bar, choose Settings > Accounts, select Sign in, and then follow the steps.

Note: The scan creates a backup file during the repair process.To change the default name or location of this backup file, in the Enter name of backup file box, enter a new name, or choose Browse to select the file you want to use. You may need to run the tool several times in order to repair your Outlook Data File.

Learn how to join a Microsoft Teams meeting if you don't have an account. Join a Teams meeting as a guest in the Windows app or on the web.

Take a closer look at the macro . You can learn a little about the Visual Basic programming language by editing a macro. To edit a macro, in the Code group on the Developer tab, click Macros, select the name of the macro, and click Edit.This starts the Visual Basic Editor.

To Insert this. Say this ' 撇 號 . 上 標 點 . 略 縮 號 -減 號 . 連 字 號 ！ 感 歎 號 . 驚 嘆 號 # 井 字 號 $ 美 元 符 號 % 百 分 號