I kept getting error 1439 when trying to restore an iPod Color in Windows. It would restore fine in OS X and was giveing the same error across multiple windows computers.

Googling turned up nothing but the solution is dirt simple: Right click on iTunes and run as an administrator.

Also, if you have MacDrive installed you probably need to disable it or you’ll get a “The iPod can not be restored because it contains files that are in use by another application.” error.