Update fail on iPad2 - error 14

Question

Hello, I try to update my iPad via iTunes connected to my PC, after its download it and try to load, ~3hours its drop message that its failure and error nr. 14, after that I can't log in to my iPad but its recognising by iTune, and I have only 2 options: restore, or update, then I try to do restore its says that I should enter key-code - but how I can do that if it not loading? If try to repeat update its say unknow error 2003. I really think now that it was bad idea to update it - but now, is that possible to recover it somehow?
iTunes 12.1.1
version before update 8.01
Windows 7 x64 all updates

Answer 1

Again, from the link I provided you earlier, it could be a USB error. If you follow all of the steps in the USB section, it says to try the hardware section, an if that doesn't work, then contact Apple Support.
Check your USB connections
Related errors: 13, 14, 1600, 1601, 1602, 1603, 1604, 1611, 1643-1650, 2000, 2001, 2002, 2005, 2006, 2009, 4005, 4013, 4014, or "invalid response."
If the USB connection between your device and computer is interrupted, you might not be able to update or restore.
To narrow down the issue, you can try different equipment:
Use the USB cable that came with your device, or a different Apple USB cable.
Plug your cable into a different USB port directly on your computer. Don't plug it into your keyboard.
Try a different computer.
Solve other issues with the USB connection, then with your security software.
If you still see the error message, check for hardware issues by following the next section.
Check for hardware issues
Related errors: 1, 3, 11, 12, 13, 14, 16, 20, 21, 23, 26, 27, 28, 29, 34, 35, 36, 37, 40, 1002, 1004, 1011, 1012, 1014, 1667, or 1669.These errors mean that your device or computer might have a hardware issue that stops the update or restore from completing.
Check that your security software and settings aren't blocking your device from communicating with the Apple update server.
Then try to restore your iOS device two more times while connected with a cable, computer, and network you know are good.
Make sure that your security software and settings are allowing communication between your device and update servers.
If you still see the error message when you update or restore, contact Apple support.