If you have a Microsoft 365 plan, to keep it active, you have to sign in at least once every 30 days. You might get an error that has a number and maybe some descriptive text. Although the messages are hard to understand, there are often solutions. If Office is taking a long time to install you may be on a slow connection. If Office still won't install, check that your computer meets the system requirements to install Office.

Troubleshoot installing Office

If you or your users find Office is taking a very long time to install, try installing using an offline installation. See Use the Office 2016 offline installer and select the Office for business tab. These steps show you how to download the installer file which you can then use to install Office offline on a PC at your convenience. When you install Office 365, all the applications that came with your particular Office product is installed at the same time. You can't custom select which Office applications you want to install or not install, nor you can't delete individual applications after your installation is complete. However, you can delete shortcuts to applications you don't plan to use.

For steps to install an offline version of Microsoft 365, see Use the Office offline installer and select the correct outlook not syncing emails tab for your version of Office. A vast community of Microsoft Office365 users that are working together to support the product and others. If you're not sure what plan you have, follow the steps in What Office 365 for business subscription do I have?

re installing office still get corrupt message when opening office apps

To remove licenses from users, see Remove licenses from users in Office 365 for business. If a user needs to install Office on a sixth computer, you have to deactivate an installation. Deactivation doesn't remove Office from the computer, but you can't use Office on that computer until you activate it. See Deactivate Office 365 if you see a "limit reached" error. The links below are specific to admins looking for troubleshooting help with these Office 365 services. For more general (not admin specific) help in these areas, see the Additional help section on the Office for Business tab of this topic.

Activate Office on a Mac

• If you're not sure which operating system you have, see Which Windows operating system am I running?
• When you install Office it's automatically linked to your Office 365 plan.
• You then deploy Office by using the software deployment method you typically use.
• For more information, see Deactivate Office 365 if you see a "limit reached" error.
• To troubleshoot Mac activation issues, see the "Activation" section in What to try if you can't install or activate Office for Mac.
• If you have an Office 365 plan, to keep it active, you have to sign in at least once every 30 days.
• Free fully functional download of Revo Uninstaller Pro, Pro Portable and Revo Uninstaller Freeware.

In most cases you can do basic editing on most of these devices, however if you have a qualifying Office 365 subscription, you get access to the apps' extra features. If you discover you can't make edits to certain documents, see What you can do in the Office apps on an Android, iOS, or Windows mobile device with an Office 365 subscription. You may get an error if you try to install the 64-bit version of Office and you currently have the 32-bit version installed (or vice versa). Learn how to uninstall Office from a PC using the Control Panel or with the uninstall support tool. Had to uninstall Office, reboot PC, then find the Office folders in the system and delete them, then re-installed Office.

Upgrade to Office 2016

If activation failures began after you upgraded to Windows 10, see Office error code 0x8004FC12 when activating Office. You can run the Microsoft 365 activation troubleshooter to help you fix activation issues. If you have an Office 365 plan, to keep it active, you have to sign in at least once every 30 days. If your subscription hasn't expired, Office will reactivate the subscription the next time you log in. Use the Microsoft 365 setup troubleshooter to install Microsoft 365, Office 2021, Office 2019, or Office 2016 on your Windows PC.

If a Microsoft 365 application such as Word or Excel isn't working correctly, sometimes restarting it will fix the problem. When you're done, you might need to restart your computer. If you need more licenses, see Buy licenses for your Office 365 for business subscription. To remove a license from your subscription, see Remove licenses from your Office 365 for business subscription. See Uninstall Office for Mac for instructions on uninstalling the Office apps.

You can't edit documents using Office apps on your mobile device

To troubleshoot Mac activation issues, see the "Activation" section in What to try if you can't install or activate Office for Mac. Office up-to-date ensures that you have the latest security updates and fixes. If your admin has given you permission to install updates, see Install Office updates. For example, you can't install Office on computers running Windows Vista or Windows XP, or on devices that aren't running a supported Windows or Mac operating system. However, you may still be able to use Office Online in your computer's browser.

You can't find the Office applications after installing Office

For example, you can't install Office on computers running Windows XP or Windows Vista. Free fully functional download of Revo Uninstaller Pro, Pro Portable and Revo Uninstaller Freeware. The steps to access the repair tool vary depending on your operating system.

See Office is taking long to install or Office hangs at 90% for possible solutions. If you're a student or teacher and don't see an option to install Office, you may be eligible for Office 365 Education, which includes Word, Excel, PowerPoint, and OneNote. All you need to get started is a valid school email address. If you're looking for the steps to download and install the latest version of Office, see Install Office on your PC or Mac.