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File formats that are supported in Excel - Microsoft Support
Lists the file formats that are supported in Excel. The topic also includes a list of unsupported file formats and some suggested workarounds.
Applies To: Excel for Microsoft 365, Excel 2021, Excel 2019, Excel 2016
Get help with Windows upgrade and installation errors
Outdated software can cause problems with a Windows upgrade, so removing old or nonessential applications can help. If you plan to reinstall the application later, make sure you have the installation media and all required activation information before removing it.
Word for Windows training - Microsoft Support
Training: Watch and learn how to use Word in Windows. Explore Microsoft Word training guides, articles, and how-to videos.
Applies To: Word for Microsoft 365, Word 2021, Word 2019, Word 2016, Office for business
Herunterladen und Installieren der neuesten Druckertreiber - Microsoft ...
Erfahren Sie, wie Sie den neuesten Treiber für Ihren Drucker installieren. Wenn Sie kürzlich ein Windows-Upgrade durchgeführt haben, muss der Druckertreiber möglicherweise erneut installiert werden.
Manage Microsoft 365 payment information and billing for your business
Learn how to manage the payment information and billing for your Microsoft 365 subscription.
Troubleshooting tips for installing and updating Microsoft Edge
Get troubleshooting tips if you run into problems downloading, installing, or updating Microsoft Edge.
如何登入 Hotmail - Microsoft Support
Hotmail 現在為 Outlook.com。 瞭解如何登入以存取您的 Outlook.com、Hotmail、Live 或 MSN 電子郵件帳戶。
Applies To: Outlook.com
Beheben von Sound- oder Audioproblemen in Windows
Erfahren Sie, wie Sie Sound- oder Audioprobleme in Windows beheben.
Anmelden bei Outlook im Web - Microsoft-Support
Hier erfahren Sie, wie Sie sich bei Outlook im Web anmelden und auf Ihre E-Mails, Kontakte und Kalender zugreifen.
Applies To: Office for business, Office 365 Small Business, Outlook on the web, Outlook on the web for Exchange Server 2016
What happens if there's an unusual sign-in to your account
Learn why you received a notification about unusual activity in your account and what to do next.