This article covers the Lucen Timeline add-in for PowerPoint on Windows. Using the browser-based app instead? See Lucen Timeline Online help.
Symptoms
When trying to install or uninstall Lucen Timeline, you keep getting prompted to close PowerPoint even though you know you’ve already closed it.
Overview
The Timeline add-in requires Microsoft PowerPoint to be closed during the installation.
In some cases, even if PowerPoint looks like it’s closed, there may be a residual process still running in the background that you need to manually end as described below.
Solution
Open Task Manager by pressing Ctrl+Alt+Delete
Locate Microsoft PowerPoint in the Processes tab
Right-click and select End Task
