Noob2TheExtreme Note Edge SM-N915W8 has no operating system

So earlier today I had some time on my hands and decided to try and root my Rogers Note Edge phone. I failed miserably and now my phone does not seem to have an operating system and continuously restarts. I tried to restore it back to its factory settings, via Odin and Factory but with no success. Can anyone help me?

"Operating System Is Modified In An Unauthorized Way" when updating to Galaxy E7 Root

Some days ago, I had rooted by new Galaxy E7 for using rooting features. But now, I am unable to download updates from Samsung using Software Update. Please tell me what to do. I have already tried unrooting the phone using superuser and then tried to update the software but it didn't worked. Now, please tell me the following things:

1. How to unroot Galaxy E7 nicely using odin?


2. How to update it to latest firmware available using Software Update

Thanks for your time.

No operating system

Hello
I have a nexus 9 which I have rooted and flashed with TWRP
Today I attempted to flash Marshmallow onto my devices but after rebooting I am given a message that decryption has been unsucessful and that I has to factory wipe my tablet.
However if I press the factory restore button it takes me to TWRP recovery boot menu.
I would like to know what I have to do from that point onwards
Thank you