That DDL seems to be for a piece of software called "Paperport" made by a company called Nuance (formally Scansoft). Either reinstall Paperport or take a look at Control Panel >> Add/Remove Programs to see if it's in that list. If it is, select it and uninstall.
It might also be worth trying Start >> Run >> Type in "msconfig" and press enter. Check the Startup tab for any mention of Paperport or that DLL and remove it.
http://www.scansoft.co.uk/paperport/