Default How to un-root (Verizon)

My phone is unable to connect to the computer for some reason tryed multiple pc's and it just wont connect :'( So i baught mobile odin pro and it says i need an unlcocked bootloader or i could brick my phone? What are the odds of that and to unroot could i just update im on 4.1.1? Im trying to claim warrenty for cracked screen and charging port going bad.