FIXED: Error Trying to Install 32-bit or 64-bit Office Applications

You can't mix 64-bit and 32-bit versions of Office. If you do, you will get "Couldn't install Office". Here is how to clear this error.
Fix Error Trying to Install 32-bit or 64-bit Office Applications

Office and Office applications on Windows operating systems come in two “bit versions”. For each version of Office (e.g. Office 2013 or 2016), there are either 32-bit or 64-bit editions.

What does 32 or 64-bit version Mean?

Whether you install a 32 or 64-bit version of Office, you’ll need to make sure all your Office applications are the same bit-version. You can’t mix 64-bit and 32-bit versions of Office on the same computer.

If you try installing a 64-bit version of, say MS Access 2016, while already having a 32-bit version of another Office application on your computer, you may get an error message that looks like this:

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

Which bit-version should I use?

The bit-version you should use depends in part on the bit version of your Windows operating system (OS), and your computer’s processor64-bit software programs only work on a 64-bit OS, while 32-bit programs may work on either a 32-bit or 64-bit OS.

Similarly, a 64-bit OS can only work with a 64-bit processor, while a 32-bit OS works with either 32-bit or 64-bit processors. Most modern computers have 64-bit processors, which have more RAM and tighter security features than older 32-bit processors.

How to find out which version of Office applications you’re using

Step 1: Open any Office application, like Word or Excel, and click on the File tab from the menu bar at the top of the window.

Step 2: Select Account or Help and look under Product Information. Here you’ll see which version of Office you have.

Step 3: To check whether it’s a 32-bit or 64-bit edition, click on the About Word (or About Excel, etc.) section, which will show you more information, including the bit-version

How to switch the Bit-Version of Office You’re Using

Step 1: To switch from using 32-bit to 64-bit Office applications, you’ll first have to uninstall all the 32-bit Office application versions you have on your computer. For help on how to uninstall your Office programs, see this guide here.

Note: you’ll also have to do this to switch from using 64-bit to 32-bit versions of Office

Step 2: Once you’ve fully uninstalled your old version of Office, you can then do a fresh installation of the 64-bit versions after.

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