"...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.

    Easy fix download button indicating an automated fix is available
  2. Select your browser from the drop-down list to see how to save and then launch the file.

    1. At the bottom of the browser window, select Save.

      Select Save to open o15-ctrremove.diagcab easy fix
    2. In the next box that indicates o15-ctrremove.diagcab is finished downloading, click Open.

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

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

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

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

      Select Open to open the O15CTRRemove.diagcab easy fix tool

      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.

      From the dropdown, 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.

      Save O15CTRRemove.diagcab file in Firefox

      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.

  3. To reinstall Office, see Install Office on your PC or Mac and follow the steps for your Office plan.

See Also

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

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