I've had a hard disk failure on my principal computer and so lost all my back up iPad data including apps. In trying to synchronise again with new disk and iTunes I get message 'iPad not synchronised with this iTunes library synching will delete all data from your iPad.' Following advice from Apple support online I have successfully transferred PURCHASED songs books and videos to computer but I cannot transfer purchased apps to library on new computer. I get a message saying all apps will be lost from iPad if I sync. Apple support appear to be no help. Can anyone help me?