Erneutes Installieren von Windows - Microsoft-Support
Erfahren Sie, wie Sie Windows auf Ihrem PC neu installieren und wie die Aktivierung nach der Installation funktioniert.
Xbox Support
Xbox Support offers help for Xbox, Game Pass, and billing questions. Get advice and customer service in the Xbox Support community.
修复 Windows 中的以太网连接问题 - Microsoft 支持
有线以太网连接可让你快速建立 Internet 连接 - 将以太网电缆的一端插入家里的路由器，然后将另一端插入 Windows 电脑上的以太网端口。
Windows のライセンス認証を行う - Microsoft サポート
プロダクト キーまたはデジタル ライセンスを使用して Windows をライセンス認証し、ライセンス認証の状態を確認し、Microsoft アカウントをリンクする方法について説明します。
Join a Teams meeting - Microsoft Support
Join Teams meeting with ease using our step-by-step guide. Learn how to join a Teams meeting via your calendar, a dial-in number, or on the web.
Applies To:
Microsoft Teams
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
Reset OneDrive - Microsoft Support
Resetting Microsoft OneDrive can sometimes resolve sync issues. Follow the steps to reset your OneDrive.
Applies To:
OneDrive for Business, SharePoint Server Subscription Edition, SharePoint Server 2019, SharePoint in Microsoft 365, OneDrive (work or school), OneDrive (home or personal), OneDrive (work or school) operated by 21Vianet, OneDrive for Mac, OneDrive for Windows
在 Excel 中将 IF 与 AND、OR 和 NOT 函数配合使用 - Microsoft 支持
如何将 IF 函数 (与 Excel 中) AND、OR 和 NOT 函数结合使用，以在给定值之间进行逻辑比较。
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 Web App, Excel for Windows Phone 10
I can't sign in to my Microsoft account - Microsoft Support
Learn how to fix problems signing into your Microsoft account. Resolve password verification, locked account, and other Microsoft account login issues.
Applies To:
Outlook 2021, Outlook 2021 for Mac, Outlook 2019, Outlook 2019 for Mac, Outlook 2016, Microsoft 365 for home, Outlook.com, GroupMe, Microsoft account dashboard, Microsoft Teams, Microsoft Teams personal, Microsoft To Do, OneDrive (home or personal), OneDrive for Mac, OneDrive for Windows, Outlook for Android, Outlook for iOS
Ändern oder Zurücksetzen des Kennworts - Microsoft-Support
Erfahren Sie, wie Sie Ihr Windows-Kennwort ändern oder zurücksetzen, wenn Sie es vergessen oder verloren haben.