I found recently that applications called HPEventsHandler (All users) and HP Scheduler (All handlers) are listed as opening automatically when I log in. Finding them in Finder they are listed as being under Library>Printers>HP>HPIO> HPEventHandler, but when I go there through Finder the only printer listed is my current Canon Printer. I have a folder of HP photo editing applications in Applications from an earlier HP printer complete with Uninstall. While some of the photo editing might be useful I decided to Uninstall to clean it all up, but got the message that the application is no longer supported. How can I clean it all up?