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.

Learn how to install, reinstall, or activate Microsoft 365 or Office 2024 on a PC or Mac.

Learn how to fix "couldn't install Office" error related to 64-bit or 32-bit versions of Microsoft Office.

Download and install or reinstall Office 2021, Office 2019, or Office 2016. Important: Support for Office 2016 and Office 2019 will end on October 14, 2025 and there will be no extension and no extended security updates. All of your Office 2016 and Office 2019 apps will continue to function.

Use the Office offline installer to install Office 2016 or Office 2013 if you don't have an active Internet connection or you're having problems with slow speed or unreliable connections.

If you need to re-install the Office or Microsoft 365 apps, we recommend that you uninstall Office first. After you've uninstalled the apps, follow the steps below.

Support for the 32-bit edition of Microsoft 365 Apps for Windows Arm-based devices is ending. New feature updates will stop in October 2025 and security updates will end in December 2026.

If you previously installed the 32-bit version of Office on your PC, but decide you now want the 64-bit version, you'll have to uninstall 32-bit and then reinstall the 64-bit version of Office.

Provides tips on how to install multiple versions of Office on the same PC.

Learn how to install Office 2010, or install and remove individual Office programs or components for both 32-bit and 64-bit versions of Office.