Originally Posted by Without Reason
I have the Galaxy S3 I747 rooted with CF auto-root (I used the instructions on the second post of this thread:http://forum.xda-developers.com/show....php?t=1963790) and the root went great. But now that it's rooted, I can't flash CWM ROM manager recovery because the KNOX security system won't let me. I can't install new ROMs and I keep getting a pop-up that says 'superSU has stopped working.'
Dose anyone know of a way to remove KNOX or of some other solution that will allow me to flash custom ROMs? I've skimmed a lot of the threads in the development forums and the general discussion forums but haven't found any sort of guide that I can understand (I'm a bit of a n00b when it comes to bootloaders and such).
You can de-knox in several ways - from the phone settings; by flashing a pre-rooted and de-knoxed ROM e.g. the modified (stock) MJ2 ROM. You can also flash the knox removal tool which you will find in the thread below which also shows another way to route other than CF-Auto Root.
Strictly speaking, however, I would doubt Knox is the culprit here. Knox is a security tool designed primarily for enterprise settings and would not stop you from flashing a custom recovery like CWM. I would suggest you re-root via Method 2 in the above thread as CF-Auto Root doesn't always work with stock 4.3.
You can also try flashing other custom recoveries like Philz Touch (enhanced CWM) or TWRP to install custom ROMs.