If you have problems with uninstalling WebOffice extensions please check whether
•the WebOffice Extensions Service has been stopped: Open the Services (Local) and stop the service if it is still running.
Stopped WebOffice Extensions Service
•the COM+ applications have been stopped: Open the Component Services and stop WebOffice ePaper/WebOffice export/WebOffice plot if they are still running.
Stop COM+ applications
Then uninstall the WebOffice extensions and install the newer version.
Note: Do not forget to start the WebOffice Extensions Service after successful installation.
Note: During the uninstall process of the WebOffice extensions also the ArcGIS 10.2 Engine will be uninstalled. To avoid problems during the uninstall/install process, please ensure, that the ArcGIS 10.2 Engine still exists on the system before uninstalling the WebOffice extensions.