"...Another installation is in progress..." or error code 0-1018 when installing Office

You may get this error message, or an error message that contains a 0-1018 code, when you try to install Office:

We're sorry, but we could not start your Office installation. Another installation is in progress, please try again later.

This error can occur if an Office install, update or uninstall was running before you tried to install Office.

Check for an Office icon in the Windows system tray and click it to check the install progress. If an install is already running, wait until it's done before you start your Office install.

If you can't find an Office icon in the system tray, uninstall Office using the easy fix tool, and then reinstall it:

Uninstall and reinstall Office

Use this easy fix tool to completely uninstall Office from your computer. Then you'll need to reinstall 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, follow the steps in Download and install or reinstall Office on your PC or Mac.

See Also

Uninstall Office 2013, Office 2016, or Office 365 from a PC