While it is possible to run more than one version of Microsoft Office at the same time, the Technology Support Center recommends that you uninstall your existing version before installing the latest version to avoid technical issues that may arise from having more than one version of Microsoft Office installed. The version of Microsoft Office that you download and install from Office 365 will not replace any existing versions of Microsoft Office on your computer. The Technology Support Center recommends that you uninstall your existing version of Microsoft Office before installing the latest version to avoid technical issues that may arise from having more than one version installed.
