I recently rooted my sgs3 sph-L710 v4.3 and am experiencing some problems. Whenever I try to open superusers it automatically closes, and I receive a notification saying, "security notice an attempt to access a secure area on your phone without authorization has been blocked." After doing some research online I discovered that the 4.3 version is protected by KNOX. Online sources state that in order to defeat the KNOX system you must update supersu, but I am not sure how to do that. Whenever I download supersu from the Google play store there is no option to update it. I would really appreciate any help thanks.