Please help!! I have a new laptop and I'm trying to back up my iphone 5s. It gets almost to the end of the process and then disconnects. I'm so confused. I've read a suggestion that there may be a security issue somewhere but I'm lost as to what to look for? EDIT I tried backing it up on my old laptop which I have been using for years. It won't work on that now either. Just tells me that 'the iphone has been disconnected'.