Itouch 1 1 4 error when updating
During the restore process, if you encounter Error 21, it means that you are trying to restore custom IPSW using the recovery mode.
To fix this issue, you must put your i Device into DFU mode.
The downloaded ipsw file is located at following locations depending upon your computer OS.
For i Phone Windows XP: System Drive:/Doc*u*ments and Settings/Application Data/Apple Computer/i Tunes/i Phone Soft*ware Updates Windows 7: System Drive:/Users/Your Username/App Data/Apple Computer/i Tunes/i Phone Software Updates For i Pod and i Pad Windows XP: System Drive:/Doc*u*ments and Settings/Application Data/Apple Computer/i Tunes/i Pod Software Updates 0r i Pad Software Updates Windows 7: System Drive:/Users/Your Username/App Data/Apple Computer/i Tunes/i Pod Software Updates 0r i Pad Software Updates Now restart i Tunes and download the update / upgrade file again.
For those who are impatient, a direct download is also available: i Pod1,1_1.1.2_3B48b_Early reports indicate that the new i Pod Touch update provides "Add Event" functionality to the i Pod Touch, confirming an email exchange from Steve Jobs who promised that edit and add calendar events would be coming in a future software update.
The lack of calendar editing had been described as a "bug" by Jobs.
Update / Upgrade using i Tunes update / upgrade button.
If you still face the same error restart your PC / Mac.
The download files will be found at the same locations except in the i Phone Software Updates directory.DFU or Device Firmware Upgrade mode allows all i Devices to be restored from any state.The actual difference between recovery and DFU mode is that when you put your i Device into DFU mode, it do not loads i Boot automatically.When you put your i Phone in recovery mode, it loads i Boot which makes sure that the firmware you are trying to restore is greater or equal to the current firmware.To fix i Tunes error 21, you must put your i Device into DFU mode using the following instructions: Connect your i Device to your PC or Mac via USB cable and launch i Tunes. After 10 seconds, release the Power button but keep holding the Home button until i Tunes detect your i Phone in recovery mode.
Search for itouch 1 1 4 error when updating:
As soon as you see the above message, restore custom IPSW and hopefully this time you will not get i Tunes Error 21.