Updating ipod software without itunes
If you are using a Windows computer, remove all USB devices and spare cables other than your keyboard, mouse, and the device, restart the computer, and try to restore.If that does not resolve the issue, see Error 1604 above.Use Tiny Umbrella and "Kick Device Out Of Recovery" to boot.This occurs when you try to downgrade your device's baseband.
Restart computer; change USB port; reinstall system.
Unknown error; try again A security software you have installed may be conflicting with i Tunes. If you are restoring to an Apple TV (3rd generation), i Pad 2 (or newer), i Phone 4S (or newer), or i Pod touch (5th generation) or newer, there is no (publicly disclosed) bootrom exploit to restore to older versions of i OS.