Diane updated her iPhone 5S to iOS 8 and now it's not running properly. She clicks on one app and another one opens. Leo says that there's always the potential of something going wrong when updating an operating system. It's like trying to pull a table cloth out from under dishes and trying to put another table cloth in its place.
The fix is easy -- Diane should reset, erase and start over. Leo says it sounds like a broken digitizer though, and Apple should replace it for no charge. Since Diane is out of warranty, she can get it replaced for $140, which isn't bad. Still, there's a chance the Genius at the Apple Store will replace it for free if she's really nice.