Error code 30033-27 when installing Office

You might see this error if a previous installation of Office failed, or if antivirus software or a firewall prevents Office from installing. Sometimes restarting your computer is enough to fix the problem. If it isn’t, here are some things you can try to fix the problem. We’ve listed the most common solutions first, so try them in order.

1 - Use the offline installer to install Office

Note: If you use Office 365 for business, contact your admin if you believe you need to use an offline installer to install Office. If you're the admin Contact Office 365 for business support - Admin Help.

The Office offline installer may help bypass potential proxy, firewall, antivirus, or Internet connection issues that might occur during an Office 2016 installation.

See Use the Office 2016 offline installer and select the offline installer for your Office version. Follow the steps for either Office 365 Home, Personal, or University, or for a one-time purchase of Office such as Office Home & Student or Office Home & Business.

2 - Repair Office from the Control Panel

The steps to access the repair tool vary depending on your operating system. Choose your operating system from the options below.

Windows 10

  1. Right-click the Start button Windows Start button in Windows 8 and Windows 10 (lower-left corner), and select Control Panel pop-up menu.

    Options and commands list see after pressing Windows logo key + X
  2. From Category view, under Programs, select Uninstall a program.

  3. Right-click the Microsoft Office product you want to repair, and select Change.

    Note: If you have a suite such as Office 365 Home or Office Home and Student 2013 or 2016, search for the suite name, even if it's just a particular application you want to repair such as Word or Excel. If you have a standalone application such as Word or Excel, search for the application name.

  4. From the How would you like to repair your Office Programs screen, select Online Repair to ensure everything gets fixed, and then select Repair. You can select Quick Repair which runs faster but only detects and then replaces corrupted files. Online Repair does an uninstall and complete repair but takes longer.

  5. Follow the instructions on the screen to complete.

Windows 8 and 8.1

  1. Right-click the Start button Windows Start button in Windows 8 and Windows 10 (lower-left corner), and select Control Panel from the pop-up menu.

    Options and commands list see after pressing Windows logo key + X
  2. From Category view, under Programs, select Uninstall a program.

  3. Right-click the Microsoft Office product you want to repair, and select the Change button.

    Note: If you have a suite such as Office 365 Home or Office Home and Student 2013 or 2016, search for the suite name, even if it's just a particular application you want to repair such as Word or Excel. If you have a standalone application such as Word or Excel, search for the application name.

  4. From the How would you like to repair your Office Programs screen, select Online Repair to ensure everything gets fixed, and then select Repair.

  5. Follow the instructions on the screen to complete.

Windows 7 or Vista

  1. Click the Start button Windows 7 Start button (lower left corner), click Control Panel from the menu list, and then click Programs and Features.

  2. From Category view, under Programs, select Uninstall a program.

  3. Click the Office product you want to repair, and then click Change.

  4. From the How would you like to repair your Office Programs screen, select Online Repair to ensure everything gets fixed, and then select Repair.

  5. Follow the instructions on the screen to complete.

3 - Uninstall and 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. When prompted, follow the steps specific to your browser to open the tool.

    Browser

    Do this

    Internet Explorer

    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.

    Proceed to step 3.

    Chrome

    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.

    Proceed to step 3.

    Firefox

    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.

    Proceed to step 3.

  3. The Uninstall Microsoft 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. Select Next.

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

    For information about signing in to install or reinstall Office, see How to install Office. Complete the steps specific to your version.

    Note: If you’re having trouble signing in, check that you’re using the correct email and password. If you still can’t sign in you may be using a different Office 365 service and have a different sign in location. See Where to sign in to Office 365.

4 - Temporarily turn off antivirus software

For information about how to turn off your antivirus software, check your antivirus manufacturer's website. Uninstalling your antivirus software may also help. Don't forget to reinstall it after Office is finished installing and if you turned it off, be sure to turn it on again.

If you're not sure which antivirus software you have, use the following instructions to get to Control Panel to find the name of your antivirus software.

Tip: Windows 10 comes with default antivirus software, Windows Defender. If you determine that you're using it, select the Start button > Settings > Update & Security, and then select Windows Defender on the left. Slide the button to Off. Remember to turn it On again.

Windows 10
  1. Go to Control Panel by right-clicking the Start button Windows Start button in Windows 8 and Windows 10 (lower-left corner), and choosing Control Panel.

    Options and commands list see after pressing Windows logo key + X

  2. Do one of the following:

    • In Category view, select System and Security > Security and Maintenance, and then select the down arrow next to Security.

    • In Large icons or Small icons view, select Security and Maintenance, and then select the down arrow next to Security.

    If Windows can detect your antivirus software, it's listed under Virus protection.

Windows 8.1
  1. Go to Control Panel by right-clicking the Start button Windows Start button in Windows 8 and Windows 10 (lower-left corner), and choosing Control Panel.

    Options and commands list see after pressing Windows logo key + X

  2. Do one of the following

    • In Category view, select System and Security > Action Center, and then select the down arrow next to Security.

    • In Large icons or Small icons view, select Action Center, and then select the down arrow next to Security.

    If Windows can detect your antivirus software, it's listed under Virus protection.

Windows 7
  1. Go to Control Panel by choosing the Start button Windows 7 Start button (lower-left corner), and choosing Control Panel.

  2. Do one of the following

    • In Category view, select System and Security > Action Center, and then select the down arrow next to Security.

    • In Large icons or Small icons view, select Action Center, and then select the down arrow next to Security.

    If Windows can detect your antivirus software, it's listed under Virus protection.

5 - Temporarily turn off the firewall

If you're using a firewall from another manufacturer, visit the manufacturer's website for information about how to temporarily disable the firewall. For Windows Firewall, please see below.

Windows 10 Windows 8.1 Windows 7 Windows Vista

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