了解如何检查正在使用的 Office 版本。 查找 Office 应用的产品名称和版本号。 注意: 如果你没有看到帐户或你已打开一个文件或文档，请从菜单中，选择文件，然后从左侧的列表中选择帐户或帮助。

Many users find that using an external keyboard with keyboard shortcuts for Excel helps them work more efficiently. For users with mobility or vision disabilities, keyboard shortcuts can be easier than using the touchscreen and are an essential alternative to using a mouse.

Enter your current password, enter your new password, and then select Save.

The steps to access the repair tool vary depending on your operating system. Right-click the Start button (lower-left corner) and select Apps and Features on the pop-up menu.

Learn how to set up your user account for multifactor authentication with Microsoft 365.

Learn how to reinstall Windows on your PC and how activation works after it's installed.

Learn how to use your Outlook inbox effectively with Microsoft Support's training resources.

How to lock cells in Excel to protect your data. You can also unlock a range of cells and grant permissions to others to edit.

See a list of options available for starting Windows in diagnostic modes such as safe mode.

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