How to resolve: We can't install the 64-bit version of Office because we found the following 32-bit programs on your PC

 If you get the following error when trying to install a 64-bit version of Office: 

We can't install the 64-bit version of Office because we found the following 32-bit programs on your PC:

Office 16 Click-to-Run Extensibility Components

Please uninstall all 32-bit Office programs, then retry installing 64-bit Office.  If you want to install 32-bit Office instead, please run the 32-bit setup.

Solution:

• Press Win+R and type 'installer' and press enter
  
  
  
  
  
• This will open File Explorer and take you to the installer folder (most likely: C:\Windows\Installer)
  
  
  
  
  
• Add the 'Subject' column
• Sort by the 'Subject' folder and scroll down to find the 'Office 16 Click-to-Run Extensibility Component 64-bit Registration'
• Right click the MSI file and choose uninstall