I have this problem. I have tried this solution. It does not work as my sign-in e-mail address in Settings > iTunes and App Store and online at My Apple ID are correct. Resetting it again, does not work. When trying to update my apps, the old e-mail address keeps coming up and blocking updates to things like Keynote and iMovie. Other updates were allowed. Where is the root address association made and how can it be fixed? The old address that is causing problems was never my address. It was 'remotely' associated with my phone when the Verizon salesman helped setup my husband's new iPhone last year. My iPhone was not in his possession. How could this happen? Thank you.