I am unable to get Viper4android to run on my Marshmallow Nexus , it works fine on my 2012 version running KitKat but on Marshmallow it keeps prompting me to install the drivers and reboot which doesn't appear to install drivers properly as I get message saying driver status abnormal . Any suggestions ? I've googled extensively

I had this on my Oneplus One

The device must be rooted which I assume it is. You need to get hold of a terminal emulation app and open a terminal window

Type su and press enter. Then type setenforce 0 and press enter

This allows the driver to work. You need to do this on every reboot unfortunately.