Default [Q] Novatech Ntab II

Hi I hope that someone can help I have a Novatech Ntab II 9.7 inch screen running 4.2.2
It comes rooted from Novatech which means I am not the super user, this means that I canít run certain apps like Sky Go Tablet as they do not run on rooted devices. As I do not have super user privileges I canít run any of the masking apps.
My question is can anybody either tell me how to fully root it so I get super user privileges or how to unroot it so the apps that I want will work.
Thanks for any help you can give.