I've been thinking about this all day. I'm wondering if I'm looking for a problem that really isn't there.
Let's go over what we do know. You've got Rontokbro in various folders und C:\Documents and Settings\All Users\Documents, but you don't have access to them. Something I should have done is to have you fix permissions on that folder so at least they'll be quarantined. This very well may take care of the problem, since you don't seem to be infected as far as I can determine.
Download this archive:
http://deckard.be/tools/fix-rontokbro.zip and extract it to your Desktop. Double-click the
fix.bat file contained within. It should briefly pop up a command window. Now run a scan with Norton. It should be able to quarantine those files now and hopefully that will be the end of this problem.
