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If you’re not sure which operating system you have, see Which Windows operating system am I running? Check that your computer meets the minimum system requirements to install Office. See System requirements for Office for a list of additional requirements. If you’re not sure how to decide between 64-bit or 32-bit, see Choose the 64-bit or 32-bit version of Office 2016.

Download and installation issues on a Mac

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 download and installation issues on Microsoft 365 login troubleshooting a Mac, see What to try if you can’t install Office for Mac. If you encountered a problem while installing Office on a PC, try restarting your computer and then attempting to install Office again. If that didn’t help, use the uninstall troubleshooter to uninstall Office completely. After your uninstall is complete, try reinstalling Office. Please let us know if you found any of these solutions helpful by clicking Yes or No next to Was this information helpful, below, and leaving us a comment.

Account or sign in issues

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

• To troubleshoot Mac activation issues, see the “Activation” tab on What to try if you can’t install or activate Office for Mac.
• Office recognizes what operating system you’re using so make sure you’re on your Mac when you click Install to begin the install procedure.
• If the Install button is grayed out, your Office 365 subscription might have expired.
• If you encountered a problem while installing Office on a PC, try restarting your computer and then attempting to install Office again.
• For steps to install an offline version of Microsoft 365, see Use the Office offline installer and select the correct tab for your version of Office.
• If your computer can’t install the full desktop version of Office because it doesn’t meet the system requirements, you can try using Office Online in your computer’s browser.
• Although the messages are hard to understand, there are often solutions.

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 you are still having problems, tell us more about your issue, including any error messages your received and where you were in the install process when you received them. You can also choose to have users sign into the Office 365 portal with their work or school account and follow the steps in Install Office on your PC or Mac to install Office themselves. If you’ve used up your five installs and want to install Office on another computer, you have to deactivate an installation. If that didn’t help, use this troubleshooter to uninstall Office completely. Please let us know if you found any of these solutions helpful by leaving us a comment below.

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.

Upgrade or switch Office 365 plans

When you install Office 2016, all the applications that came with your particular Office product are installed at the same time. Users need licenses to install Office and to use Outlook, SharePoint Online, Lync Online, and other services. As the Office 365 for business admin, you’re responsible for Managing user software in Office 365. You assign licenses to new users when creating new accounts, or add licenses to existing users, see Assign licenses to users in Office 365 for business.

You then deploy Office by using the software deployment method you typically use. To help you set up your organization, see Set up Office 365 for business – Admin Help. For more information, see Deactivate Office 365 if you see a “limit reached” error. If the Install button is grayed out, your Office 365 subscription might have expired.

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.