Make sure all your stuff is backed up with your Google account. Anything on your SD-Card (external) will not be touched. Turn your phone off.
Then:
- Hold the Power + Volume Up button until your screen turns on
- Even if the logo bot logo doesn't immediately come up, release the Power Button (Still holding Volume Up)
- The top Left of the Boot logo should say "Recovery Booting..."
- Once the Recovery boots and you see options, use the Volume Keys and scroll to 'Data/Factory Reset' and Press the Power Button to confirm
- Click 'Yes', and then once that's finished Click 'Wipe Cache Partition' and Click 'Yes...'
- Click 'Reboot'
- The phone could take up to 5 -10 minutes to boot, please be patient.
- Once it boots, skip through the setup, you can add everything later.
-Immediately Go into Settings and attempt to Update it (OTA first, then try this again but use Kies).
If that doesn't work, let me know.
****USE THE STOCK CABLE WHEN CONNECTING TO YOUR PC, AS I HAVE HAD ISSUES (INCLUDING YOURS) USING 3RD PARTY CABLES!!! ALSO TRY THE USB PORTS IN BACK
OF YOUR PC IN THE EVENT THE FRONT PORTS ARE PLUGGED IN THROUGH AUX USB PORTS (USB DRIVER ISSUES)****