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

If you see this error message, or an error message that contains the codes 0-1018 when installing Office, the first thing you can try is restarting your computer. Be sure to bookmark this page in case a restart doesn't solve the issue and you need to try some of the other solutions below.

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

If you get the message again, first remove the OfficeClickToRun.exe following the instructions in Step 1 below. Then, continue with the uninstall and reinstall using the easy fix tool, following the instructions in Step 2.

Step 1 - Remove OfficeClickToRun.exe from Task Manager

  1. Press Ctrl + Alt + Delete, select Task Manager, and then select the Details tab (see below).

    (If you're using Windows 7, open the Task Manager by right-clicking the taskbar, and then click Start Task Manager.)

    Screen shot of the Details tab on Task Manager
  2. On the Details tab, search for a file called OfficeClickToRun.exe. If you see this file, right-click it and then select End Task. Repeat this step if there is more than one instance of this exe file.

    (If you're using Windows 7, click the Processes tab to see all processes currently running under your user account and a description of each. Click OfficeClickToRun.exe, and then click End Process.)

    If you don't see the OfficeClickToRun.exe file just go on to Step 2 to uninstall, and then reinstall Office.

Step 2 - 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 and completely clean up your Office installation.

    Easy fix download button indicating an automated fix is available
  2. Select your browser from the drop-down list to see the remaining steps.

    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.

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

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

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

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

    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.

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

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

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

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

    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.digicab, and then select the folder icon. Double-click the O15CTRRemove.digicab.

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

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

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

      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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