Excel help & learning
Find Microsoft Excel help and learning resources. Explore how-to articles, guides, training videos, and tips to efficiently use Excel.
修复 Office 应用程序 - Microsoft 支持
如果Microsoft 365 应用程序（如 Word 或 Excel）无法正常工作，有时重启会解决问题。 如果这不起作用，你可以尝试修复它。
Applies To:
Excel for Microsoft 365, Word for Microsoft 365, Outlook for Microsoft 365, PowerPoint for Microsoft 365, Access for Microsoft 365, OneNote for Microsoft 365, Publisher for Microsoft 365, Visio Plan 2, Excel 2021, Word 2021, Outlook 2021, PowerPoint 2021, Access 2021, Project Professional 2021, Project Standard 2021, Publisher 2021, Visio Professional 2021, Visio Standard 2021, Office 2021, OneNote 2021, Excel 2019, Word 2019, Outlook 2019, PowerPoint 2019, Access 2019, Project Professional 2019, Project Standard 2019, Publisher 2019, Visio Professional 2019, Visio Standard 2019, Office 2019, Excel 2016, Word 2016, Outlook 2016, PowerPoint 2016, Access 2016, OneNote 2016, Project Professional 2016, Project Standard 2016, Publisher 2016, Visio Professional 2016, Visio Standard 2016, Office 2016, Microsoft 365 for home, Office for business, Office 365 Small Business, Microsoft 365 admin, Office 365 operated by 21Vianet, Office 365 operated by 21Vianet - Small Business Admin, Office 365 operated by 21Vianet - Admin, InfoPath 2013, Office 365 Germany - Enterprise, Office 365 Germany - Enterprise admin
Hardware warranty, services, and repair
Review the warranty terms, check your warranty status, and learn about the protection plans for your Microsoft device or accessory.
How to check if an app or program is installed in Windows 10
Select Start > Settings > Apps.. Apps can also be found on Start .The most used apps are at the top, followed by an alphabetical list. See installed apps and programs on your device
Record a slide show with narration and slide timings
The slide show opens in the Recording window (which looks similar to Presenter view), with buttons at the top left for starting, pausing, and stopping the recording.Click the round, red button (or press R on your keyboard) when you are ready to start the recording. A three-second countdown ensues, then the recording begins.
Applies To:
PowerPoint for Microsoft 365, PowerPoint for Microsoft 365 for Mac, PowerPoint for the web, PowerPoint 2021, PowerPoint 2021 for Mac, PowerPoint 2019, PowerPoint 2019 for Mac, PowerPoint 2016
使用“自动求和”对数字求和 - Microsoft 支持
如果需要对一列或一行数字求和，请让 Excel 为你计算。 选择要求和的数字旁边的单元格，在“开始”选项卡上选择“自动求和”，按 Enter，即可完成。 选择“自动求和”时，Excel 会自动输入一个公式 (，该公式使用 SUM 函数) 对数字求和。 下面是一个示例。
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, Excel for iPad, Excel for iPhone, Excel for Android tablets, Excel for Android phones
Obtenez la dernière mise à jour - Support Microsoft
Les appareils Windows peuvent obtenir de nouvelles fonctionnalités à différents moments, car Microsoft fournit des mises à jour, des correctifs, des améliorations et des améliorations non liés à la sécurité via plusieurs technologies de maintenance, notamment le déploiement de fonctionnalités contrôlées (CFR). Windows vous indique si vous devez redémarrer votre appareil pour ...
Microsoft.com Worldwide
Microsoft.com Worldwide. Microsoft.com is available in a variety of countries/regions. Choose your language preference below.
Get help with clipboard - Microsoft Support
Using clipboard. When you copy content on your PC, it’s automatically copied to your clipboard for you to paste. Not only can you paste multiple items from your clipboard history, but you can also pin the items you tend to use all the time and sync your clipboard history to the cloud.
Microsoft Store & billing help
Explore Microsoft Store services From free shipping and returns to our 60-day price protection, we’re here to help you do more with best-in-class devices, software, games, and resources.