Fixing iTunes Error 21 in iPad3

I came across iTunes Error 21 in my iPad3? Please give me suitable suggestions to fix this issue.

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Error 21 message on iPad tablet show that you have a third-party security software issue.
Choose one of several ways to get rid of this issue. Common causes include an incorrect
date or time on your computer, not being logged in as an administrator and not having the
most up-to-date version of iTunes on your system. For fix this problem do as I am giving
below.

1. First of all Click the Apple icon at the top of the computer screen if you are using OSX.
Click the Start button if you are using Windows.
2. Click the "Log Out" option in the menu for both operating systems. Wait until the Welcome
screen appears.
3. Type the username and password for the administrator account into the fields provided for
both operating systems. Press the "OK" button to sign in as an administrator.
4. Update the iPad through the iTunes software to relieve the error.

>>This error is encountered after we have jail broken our apple products.

>>To have a successful jail brake of any apple product we need to restore the custom IPSW.

>>The error 21 is encountered it means you are trying to do the restoration using recovery mode.

>>To fix this issue, you must put your iDevice into DFU mode.


:::::::Here are the steps that you need to follow:::::::
1.Connect your iDevice to your PC or Mac via USB cable

2.Launch iTunes in your mac book or your computer.

3.Hold the Home+Power button for 10 seconds.

4.After 10 seconds have passed release the Power button but keep holding the Home button until iTunes detect your iPhone in recovery mode.

5.Now your device is in the DFU mode and you would not be able to see anything on your device screen.Also itunes will detect your device in recovery mode only.



"""""""All the best"""""""

Follow the steps below :
1. Connect the iDevice with your PC and launch iTunes.
2. Hod down the Home + Power button for 10 seconds.
3. After 10 seconds, release the Power button but keep on holding the Home button and iTunes detect your iDevice in recovery mode.
4. Once your iDevice in Dfu mode, you should not see anything on its screen and it should be completely blank.
5. You will see a message there, and as soon as you see the message, restore custome ISPW and hopefully this time you will not get the Error 21.

To fix this issue, you must put your i pad into DFU Mode






Basically DFU (Device Firmware Upgrade) mode is not a restore mode or recovery mode. But it bypasses the current OS installed in your device and allows you to upgrade or downgrade your current I OS.



To fix iTunes error 21, you must put your iPhone into DFU mode using the following instructions:


Firstly you have to plug the "i Pad " to the computer and open the " iTunes".



Now put your i Pad device into "DFU" mode so that you will restore the device .


For putting the device into DFU mode by just follow the steps:


Turn "OFF" your "i Pad" and "HOLD" down power button for 3 sec.


After enter into "DFU" mode your "i Pad" screen goes blank and get pop up message in iTunes apps “Device in Recovery Mode".


After all these your iPhone device will start to restore back to the i OS firmware.


This process will take latest 10 minute for processing so never disturb or do any thing with device.

Originally Posted by Unregistered

I came across iTunes Error 21 in my iPad3? Please give me suitable suggestions to fix this issue.

Fixing iTunes Error 21 in iPad3 :

- - > Completely remove iTunes from your computer.

- - > And the open your hosts file using notepad.

- - > It can be found at C:/Windows/System32/Drivers/Etc/

- - > And remove the two lines shown in the image below

- - > And save the file.

- - > Install iTunes again.

- - > If you are restoring a custom firmware,

- - > You will need to put your iPhone into pwned DFU mode

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