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SUM function - Microsoft Support
How to use the SUM function in Excel to add individual values, cell references, ranges, or a mix of all three.
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
End of support for Cortana - Microsoft Support
Explore subscription benefits, browse training courses, learn how to secure your device, and more.
My OneDrive says it's full - Microsoft Support
Learn how to get more storage or delete excess files if your OneDrive is full or near your storage limit.
Applies To: OneDrive for Business, OneDrive (work or school), OneDrive (home or personal), OneDrive (work or school) operated by 21Vianet, OneDrive for Mac, OneDrive for Windows
Windows Update-Problembehandlung - Microsoft-Support
Erfahren Sie, wie Sie die Windows Update-Problembehandlung ausführen, um Fehler beim Herunterladen oder Installieren von Windows zu beheben.
Set up the Xbox Wireless Adapter for Windows | Xbox Support
Find out how to set up and use the Xbox Wireless Adapter for Windows, including how to connect the adapter to your Windows device and pair your controller to the adapter.
Error “Something Went Wrong [1001]” signing in to Microsoft 365 Desktop ...
Roaming of the work account's device certificate is not supported. The certificate, issued by "MS-Organization-Access", is stored in the Personal (MY) certificate store of the current user and on the local machine.
Applies To: Excel for Microsoft 365, Word for Microsoft 365, Outlook for Microsoft 365, PowerPoint for Microsoft 365, Outlook for Microsoft 365 for Mac, Microsoft 365 Apps for business, Office app for Android, Office app for iOS, OneDrive for Windows
Protect yourself from tech support scams - Microsoft Support
Learn how to protect your PC, identity, and data from tech support scams.
Free up space for Windows updates - Microsoft Support
Learn how to free up space for Windows update including deleting nonessential files, using an external hard drive, and updating your hard drive.
Complete guide to Narrator - Microsoft Support
Learn how to use Narrator, a screen-reading app built into Windows, with this complete guide and how-to articles.
修复 Microsoft Store 应用出现的问题 - Microsoft 支持
如果你使用的是 Windows 11,并在使用 Microsoft Store 中的应用时遇到问题,请考虑这些更新和修复程序。 首先,登录到你的 Microsoft 帐户。 接下来,按照显示的顺序实施这些可能的解决方案。