i can't restore after update to 8.1.3 on my iphone 4s

First of all, bad, bad idea upgrading to iOS 8 on a 4S.

From how you wrote it seems that your iphone in stuck in recovery mode.

You may try a quick reset by holding down the home and power key at the same time.

After that you should see the "connect to itunes" icon on the screen at through itunes you should be able to see the recover from backup option.

Hope it helps.

Hold down the Home and Power buttons until the Apple appears (up to 30 seconds).

Cheers,

GB

Here's what the Apple Support site says about error 14:

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 may be unable to update or restore.

To narrow down the issue, you can also change up your hardware:

• 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.
• If necessary, resolve any further issues with the USB connection, then with your security software.

If you're still seeing the error message, check for hardware issues by following the next section.

Check for hardware issues

Related errors: 1, 3, 10, 11, 12, 13, 14, 16, 20, 21, 23, 26, 27, 28, 29, 34, 35, 36, 37, 40, 1000, 1002, 1004, 1011, 1012, 1014, 1667, or 1669.

These errors mean that your device or computer may have a hardware issue that's preventing the update or restore from completing.

1. Check that your security software and settings aren't preventing your device from communicating with the Apple update server.
2. Then try to restore your iOS device two more times while connected with a cable, computer, and network you know are good.
3. Confirm that your security software and settings are allowing communication between your device and update servers.
4. If you still see the error message when you update or restore, contact Apple support.

The link to the whole support page is: Resolve iOS update and restore errors - Apple Support

Cheers,

GB

It's common place for backups that are corrupt to have any number of random errors. You should Google corrupt iTunes backups and you'll find some options for solutions. The decipher backup repair blog offers tips for possible ways to fix some of these errors which might be helpful for your own backup.

how did you resolve this as my phone is stuck too and nothing is working ?