ipad unknown error (11)

[iMore Question]

please, can you tell me, how to do for this problem for my ipad 4. i want to update the ios 6.1.3 to ios 7.

 

[kch50428]

Previously jailbroken device?

Check your computer's hosts file for entries involving *.apple.com - and if any exist... remove them from the hosts file... re-start the computer and try to restore via iTunes... you may need to put the device in DFU mode.