“Office (64-bit or 32-bit) couldn’t be installed” error when trying to install

If you tried to install a 64-bit or 32-bit version of the Office suite, or an Office standalone application such as Visio on a computer that already has either the 32-bit or 64-bit version of Office, you could see one of the following error messages. This occurs because you can't mix 64-bit and 32-bit versions of Office.

Can't install 32-bit Office over 64-bit Office error message

Can't install 32-bit over 64-bit Office error message

What to do

To fix this error and switch from 32-bit to 64-bit, you must do the following in this order.

  1. Uninstall Office

    Go to Uninstall Office from a PC and follow the steps to uninstall the version of Office (or stand-alone Office application, such as Visio or Project) you don't want.

  2. Install the 32-bit or 64-bit version of Office

    Select your version below and follow the installation steps.

For overall guidance about which version to install, see Choose the 32-bit or 64-bit version of Office. If you're not sure which bit version you may have already installed, see What version of Office am I using?

Expand your Office skills
Explore training
Get new features first
Join Office Insiders

Was this information helpful?

Thank you for your feedback!

Thank you for your feedback! It sounds like it might be helpful to connect you to one of our Office support agents.

×