Disable it in MSConfig (Windows) or Startup Items (Mac)
iTunes got a mind of its own and would not stop launching, playing, & downloading song after song, even after I quit, restarted, shut down, booted again. I reinstalled 11.0.1 with no result. Nothing worked but disabling iTunes helper. (I'm waiting to see if it really worked permanently.)
What is this all about? And do I need iTunes Helper for any essential tasks?