Can't switch from Office 365 to Office 2013 or Office 2016

If you try to install Office 2013 or Office 2016 and you get an "invalid product key" message, the problem might be that you already have Office 365 or an Office 365 Trial installed. Before you can install Office 2013 or Office 2016, you'll need to remove Office 365.

Uninstall Office 365 and install Office

1. Click this easy fix button to uninstall Office.

   

2. For the remaining steps showing how to save and use the easy fix, select your browser from the drop-down list below

   Select your browser

   

   • Select your browser
   • Edge or Internet Explorer
   • Chrome
   • Firefox

   1. At the bottom of the browser window, select Open to open the O15CTRRemove.diagcab file.

      

      If the file doesn't open automatically, choose Save > Open Folder, and then double-click the file (it should start with "O15CTRRemove") to run the easy fix tool.

   2. The Uninstall Microsoft Office wizard launches. Select Next and follow the prompts.

   3. When you see the Uninstallation successful screen, follow the prompt to restart your computer for the changes to take effect. Select Next.

   4. After restarting your computer, you can try installing Office again.

   1. In the lower-lower left corner select the o15CTRRemove file and from the drop down, select Show in folder.

      

      Double-click the download, o15CTRRemove to run the easy fix tool.

   2. The Uninstall Microsoft Office wizard launches. Select Next and follow the prompts.

   3. When you see the Uninstallation successful screen, follow the prompt to restart your computer for the changes to take effect. Select Next.

   4. After restarting your computer, you can try installing Office again.

   1. Select Save File, and then OK.

      

      In the upper-right browser window, select Show all downloads. In the Library, select Downloads > O15CTRRemove.diagcab, and then select the folder icon. Double-click the O15CTRRemove.diagcab.

   2. The Uninstall Microsoft Office wizard launches. Select Next and follow the prompts.

   3. When you see the Uninstallation successful screen, follow the prompt to restart your computer for the changes to take effect. Select Next.

   4. After restarting your computer, you can try installing Office again.

Reinstall Office

To reinstall Office 365 or Office 2016, follow the steps in Download and install or reinstall Office on your PC or Mac.

To reinstall Office 2013, see Download and install or reinstall Office 2013 on a PC.