On computers with touchscreen monitors running Microsoft Office 2013 or 2010 there are instances where shutting down the Office application with ndOffice installed doesn't happen instantly. Instead it takes up to 20-30 seconds for the application to shutdown.
Microsoft has released a fix to solve these issues which have to do with .Net Framework.
You can read about the download, a VSTO runtime, and the problems here:
You can download the fix from that same page, or here: