Find answers to frequently asked questions about Office 2021 and Office LTSC for Windows and Mac on the official support page.

Change your screen saver settings. Select the Start button, then go to Settings > Personalization > Lock screen, and select Screen saver settings.In the Screen Saver Settings window, choose a screen saver from the drop-down list.

Learn how to install Windows 7 Service Pack 1 (SP1). Includes info about how to get the download, requirements, and more.

How to freeze panes in Excel to keep rows or columns in your worksheet visible while you scroll, or lock them in place to create multiple worksheet areas.

Need help with an Xbox console, an Xbox game, or Xbox network? Find out how to get in touch with us.

Smart App Control is a feature of Windows 11 that helps to block malicious, untrusted, or potentially unwanted apps from running on your device.

Découvrez comment installer, réinstaller ou activer Microsoft 365 ou Office 2019 sur un PC ou Mac.

Explore OneDrive support, help, and learning resources. Learn how to protect your important files, documents, and memories with OneDrive.

Warning: Excel provides the DATEDIF function in order to support older workbooks from Lotus 1-2-3.The DATEDIF function may calculate incorrect results under certain scenarios. Please see the known issues section of this article for further details.

Help to decide whether you should install the 32-bit Office version or the 64-bit Office version. Which version is right for you depends on how you plan to use Office. Find out about choosing between 32-bit Office and 64-bit Office.