Q: How to fix the slide to upgrade issues

If the Slide to Update screen won’t go away after you update to iOS 9:

  https://support.apple.com/en-us/HT205239

problem is that although iTunes reads the ipad it will not back it up as error message comes that ipad is 'not set up' so catch22 situation unless I want to restore and set up as new and loose all my data so I'll wait for them to sort a better way out of this mess of not having an ipad to use..............