Samsung has a hidden program loaded on a lot of carrier branded devices called DT Ignite.
I know it's on the Verizon S7 edge, and some TMO users have reported it as well.
If you disable one of the apps that the DT ignite system loads, it will automatically reinstall it and activate it immediately, in the background, with no input from you.
http://[https://play.google.com/stor...dwarepreventer
Try that. If the DT ignite is on your phone, You can then disable it and force stop it.
Aftet that has been stopped, you should then be able to get Lookout to stop running, and shouldn't force itself back on your phone.