My iPod won't connect with iTunes!

On my ipod a usb symbol pointing towards iTunes is showing up, but every time I plug it into iTunes my device does not show up. My iPod is doing nothing but showing this screen. This is coming after I had an error in updating my iPod and unplugged it. I have already tried restrating my computer, restarting my ipod touch, and changing my usb cable and port. Nothing is working. I really don't care if it updates at this point I just want my iPod to be functional!!