Need help in removing superuser without root
So the story goes, I rooted my phone using Framaroot 1.8.1 and yes it was rooted successfully. Recently I updated my phone to version A706ROW_1_S_2_001_0018_130705, and because of this my phone became unrooted but still had superuser installed. I would like to re-root my phone using Framaroot again but it cannot be rooted due to superuser. I had no luck in other threads as I am new to the android world that even simple terms, I couldn't comprehend. I would like to ask a clear and brief guide/ explanation to how my unrooted phone with superuser's presence be removed completely. Thank you in advance, Please.