Unable to update IOS
I am attempting to update IOS on an iPad. It is currently running version 9. Due to the length of time since it’s been updated, I need to use iTunes (Windows) to update. Each time I try to update, I get the error that the backup is corrupt and to delete the backup. However, there is no backup listed in device preferences and there is likewise nothing to delete when I try to do it manually in the mobilesync folder. I have also tried deleting and reinstalling iTunes. Any help is greatly appreciated.
iPad Air Wi-Fi