Newbie here... hoping someone can help with the itunes issue I'm having; Using a 2005 powerbook, 10.4.11 Recently installed an auto software update that included an itunes update. once updated, itunes will not open. comes up with 'This copy of itunes is corrupted or not installed correctly. Please reinstall itunes' I have downloaded the latest itunes and tried various times to install however install gets close to complete then states the install fails due to a corrupt file. Naturally I don't want to loose all the songs and videos accumulated in itunes.. Can anyone assist?? I've also looked to clear caches in Library/caches etc but nothing I've tried seems to fix.