I can not get the updates to work even though I pug my iPad into a PCM to update . My iPad says it will update once it is plugged into my old p c which specifies the name of the computer. How do I Chang this. So I also cannot get movies I rented on iTunes to transfer to my iPad. I have done all of this a while back with no problem. Recently I changed Internet providers but really don't believe that should have any impact on not being able to up load rentals from iTunes.