Click-to-Run is the technology used to install Office 365 subscription and most versions of Office 2013 and newer. Windows Installer technology (MSI) was used to install the volume license editions of older versions of Office 2016 and older, such as Microsoft Office Professional Plus and Microsoft Office Standard.
You can't install the same version of Office products 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.
Note: 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.
Uninstall the Windows Installer (MSI) version of Office
You can stay with the Windows Installer version of Office and not install the Office 365 Click-to-Run version you were trying to install. Or, do the following:
- Follow the steps in Uninstall
Office from a Windows
computer
to remove the Windows Installer
version of Office.
- Retry the installation of Office you
were doing when you got the error
message.
Source