I have a PC with windows 7 fully updated. When I try to backup my ipad - either by right clicking on the device in itunes or during the sync the back up starts and then after 5 mins or so my ipad decides to reboot itself. The device drops from itunes and then reappears when the ipad has completed its reboot. My ipod touch works fine - both back up and sync. I have uninstalled and reinstalled itunes. I have tried other USB ports on my pc. I have cleared the old backup on itunes (probably may live to regret this) as another post suggested this. I haven't (well can't actually I think due to this problem) updated to ios5. Any assistance greatly appreciated.