Ending a Running Word Process
Citavi's Word Add-In cannot be installed if a Word process is running in the background while Citavi is being installed. Here's how you can fix the problem:
End all running Word processes
End Word if it is still appearing in the Windows taskbar.
Open the Windows Task Manager: Ctrl+Alt+Delete
Search for the Microsoft Word process.
Select the entry, and click End task.
Install the Citavi Word Add-In again
1.Switch to the Windows Control Panel.
2.Click Programs and Features.
3.Click Citavi [version number].
6.Click the red "x" next to Word Add-In and select This feature will be installed on local hard drive.