How to Root LG Optimus 4X HD P880 with Android 4.1 Jelly Bean Firmware:
Download and extract the Root.rar file to C:\.
Reboot into recovery by holding VOL Down while turning on the phone.
Select in recovery menu – Apply update from ADB.
Plug the device to PC.
Double click ROOT.bat from archive.
Wait until the phone finish the install and reboot.
Done. Superuser icon will appear on the screen, running "information page, click here to check for updates.
i have downloaded the files etc allready just double checking before i go ahead..............