First off, I don't think this is anything more then an annoyance and more importantly harmless. I believe it to be a remnant of the original iTunes install. HJT is reporting it...well..because it's there, while Winpatrol is reporting it because it's not in there data base....
The one security aspect you don't have covered is trojans (which if this was something, that's what it would be). This is the best http://www.misec.net/trojanhunter/ and the thirty day trial is fully functional. Run it and see if it comes up clean.
When it comes up clean (and it will) install this http://fileforum.betanews.com/detail/Process_Explorer_for_Windows_NT2000XP2003/1063606657/1 . If it's running (and I think not) it will show up in the process panel.
If it's not running and all of your security scans are clean....forget about it. It's a non-issue.