Microsoft Office – Installer compatibility ‘Click-to-Run’ and ‘Windows Installer’

Unfortunately, you can’t have Office products of the same version (like 2013 or 2016) that use two different installation technologies installed on the same computer. This also applies to standalone applications like Access, Visio, Project, Skype for Business, or OneDrive for Business.

https://support.office.com/en-us/article/Office-installed-with-Click-to-Run-and-Windows-Installer-on-same-computer-isn-t-supported-30775ef4-fa77-4f47-98fb-c5826a6926cd?ui=en-US&rs=en-US&ad=US

Error when trying to install Click-to-Run over MSI install

 

In some cases, you also can’t have two different versions of Click-to-Run applications on the same computer. For more information, see “Stop, you should wait to install Office 2016” error.

https://support.office.com/en-us/article/Office-installed-with-Click-to-Run-and-Windows-Installer-on-same-computer-isn-t-supported-30775ef4-fa77-4f47-98fb-c5826a6926cd?ui=en-US&rs=en-US&ad=US