SUMIF function - Microsoft Support
How to use the SUMIF function in Excel to add the values in a range that meet criteria that you specify.
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016
下载并安装或重新安装 Office 2019、Office 2016 或 Office 2013
了解如何在电脑上安装 Office 2013 或 Office for Mac 2011。
Applies To:
Office 2019, Office 2016, Office 2016 for Mac, Office 2013
Add, turn off, or remove extensions in Microsoft Edge
Learn how to manage extensions in Microsoft Edge, including adding, disabling, or removing them as needed.
Manage devices used with your Microsoft account
Learn how to manage your Microsoft devices. Add, remove, register, or rename a device on your Microsoft account.
Applies To:
Microsoft account dashboard
Change or reset your PIN - Microsoft Support
Learn how to reset your PIN if you aren't signed in to Windows and having trouble using your PIN.
Change your Microsoft account password - Microsoft Support
On the Change your password page, enter your current password and then enter your new password. For additional security, select the optional checkbox which prompts you to update your password every 72 days.
Applies To:
Microsoft account dashboard
Install the latest updates for Windows - Microsoft Support
Learn about Windows service packs and download the latest updates for Windows 10 and Windows 8.1
Contact - Microsoft Support
Contact Microsoft Support. What's new. Surface Pro; Surface Laptop; Surface Laptop Studio 2
Open your entire favorites bar in Microsoft Edge
How to open all of your Favorites Bar shortcuts in the Microsoft Edge web browser.
Tastenkombinationen in Windows - Microsoft-Support
Erfahren Sie, wie Sie Windows mithilfe von Tastenkombinationen navigieren. Hier finden Sie eine vollständige Liste der Taskleisten-, Eingabeaufforderungs- und allgemeinen Windows-Tastenkombinationen.