Secure booting Error!

So I was trying to install TWRP on my freshly rooted V500 5.0 korean kdz, followed the steps exactly and I tried to reboot to recovery and got the
Secure booting Error!
Cause: boot certification verify

Reading through a few other threads, I tried going into download mode and upgrade recovery through the LG mobile support tool, but that says no items to upgrade. Now, my tablet will not boot up past the error screen and I'm having no luck finding any way to get it booting. Any ideas? Thank you in advance for any help!!

Secure Fail: Kernel

So I finally got a chance to upgrade to OF3 and my phone restarted on me. Now I am getting a "secure fail: kernel". I was rooted. i tried re-flashing the OA1 kernel and no luck. Is there anyway that i'm gonna be able to fix this without losing root? I've searched around the net and I cant find anything that works. Please help!