Sign in with Microsoft
Sign in or create an account.
Select a different account.
You have multiple accounts
Choose the account you want to sign in with.

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

Installation error message if there is a 32-bit or 64-bit incompatibility problem

What to do

To fix this error and switch from 32-bit to 64-bit (or vice-versa), 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?

Need more help?

Want more options?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

Find solutions to common problems or get help from a support agent.

Was this information helpful?

What affected your experience?
By pressing submit, your feedback will be used to improve Microsoft products and services. Your IT admin will be able to collect this data. Privacy Statement.

Thank you for your feedback!