Go Start, All Programs, and look for the program there, point to it and see if an "uninstall" option is included with it. If not try reinstalling the program and hopefully the uninstall program will be listed as well.
If still unsuccessful, search Google for uninstall programs, find one there and download it, hopefully, when you run it, it will find your program and you can then uninstall it.
Go to the drive where Paperport One Touch is (was) installed, by default it should be C:\Program Files\Paperport One Touch
If you can locate it then simply highlight the folder and hit delete on you're k-board. whola...gone in sixty seconds :)
If you cant find it there than its most likely removed already
If the program is no longer on the machine (as above) then do a search on *.cpl files and remove the file with hte name like paperport.cpl (or just to be safe rename it paperport.old) and then the control panel will not see it.
Please start your own thread, and supply more information about your PC and your problem. But try "START" "ALL PROGRAMS" "NERO 7" "UNINSTALL".
If that fails, find your installation program and try and reinstall, it may ask you "Are you sure you want to fully uninstall this product?"