fixing 1439 error on 160gb shuffle
I have had this happen twice and been unable to restore my Ipod immediately. I have tried most of the recommended solutions ie, changing USB port, switch off computer etc to no avail. My Ipod wouldn't even show as existing when I plugged it in for some time. I found that just trying to restore added 1-2 bars each time but it did not complete stop the recovery.
However this worked:
leave Ipod plugged into computer.
Press the centre button and menu at the same time until Itunes recognises there is an ipod plugged in. It should also recognise that the Ipod is corrupted and commence downloading recovery software.
With any luck this will then restore the ipod, however you may need to do this several times.
After restoring, move slowly through the menu of itunes, confirming your name and what you want to sync - don't make the mistake of restoring again as you may have to start all over again.
Click sync and it should work OK.
and hold your breath.
best of luck