I am currently rocking the Security Error. I got ahead of myself and started freezing apps to backup and dump from the phone after rooting using Lelus method. Well after a reboot security error.
I have tried http://forum.xda-developers.com/show....php?t=2085344 and http://forum.xda-developers.com/show....php?t=2368752 and http://androidforums.com/optimus-l9-...al-update.html and ...... the list goes on.....
For most of the methods I get to 4% and it stalls. I have tried to do the 3 finger hard reset and it still goes straight to Security Error.