Ursprünglicher Beitrag von: Chris Green ,
You will need to restore it to regain functionality. This will delete all data on the iPod, including music, videos, apps, ect. Use [http://www.iclarified.com/entry/index.php?enid=1034|this guide] to put the device into DFU mode, then open iTunes. Select your iPod in the sidebar, and click restore. It will download the update, and restore the device to factory settings.