[Android Q&A, Help & Troubleshooting] :
First off, if anyone is to respond to this question, please do not lecture on dangers or the "why" of forcing closing apps, or how they can be more a detriment on the system, etc. This doesn't answer the question and just makes everyone else who may be seeking an answer more pissed off when someone starts to question you on why do you want that feature, etc. The same goes true on trying to change the subject, or otherwise just failing to answer the question. If you don't know, then don't reply.

I have a [currently] un-rootable tablet which is a Verizon Asus ZT581KL running Android 6.0.1. There is a system update available. There is no [easy] way to ignore or close this update notification. If one says no to available system update (Android 7), it will magically re-appear and is hell bent on at least downloading the update and then trying to force you to pick a time to install it. By not installing the update, one has to suffer the notification that is always there and one has to be mindful to not accidentally hit yes to install the update. Factory reset (annoying) fixes this for about 24 hours.

[do not reply on how to get rid of the notification or other tips which do not answer the question, if you do, I will find you and I will kill you. (unless it's another workaround solution, in which case I will give you a big shiny nickel along with my gratitude)]

On this tablet, the OTA download and installation is run via this system service called FOTAService, and it's a sly little bastard. If you force stop it, it will re-initialize--only if you hit it like 4-5x will it "seem" to stay closed--but it will resume the download once the service is restarted/phone rebooted presumably--I wouldn't be surprised if it tried to start again on it's own if left the device to sit and simmer for a few hours.

However, there is a grimmer of hope: If I goto settings->app manager-> . . .->system apps->FOTAService->Storage and hit clear data, the notification seems to go away. Unknown at this time is if will resume or restart the download on it's own or next reboot. This is a service you cannot disable without root.

There are apps out there that will presumably disable autostartup apps/service even they say without root. I've tried All in One Toolbox, and it did not seem to disable the service--probably because I do not have root.

Obviously I do not want to update android because I will more than likely have better chances on older version versus newer version to be able to root it, if/when it becomes available.

My question: Are there any [good] apps that will allow me to either persistently auto-kill apps/services (the equivalent of manually going to app manager and hitting force close over and over again) via NO ROOT. A program that just makes sure a certain program doesn't load, and if it does will keep killing it

as it spawns a process.

AND/OR

A program that will allow me to do the equivalent of clearing app data/cache either whenever app data is present and/or at predetermined times ..i.e. on an automatic/polling basis.

(mindfart...maybe automateit app can do that..I'll have to check)

If I can have it so something is running keeping FOTAService from spawning or automatically nuking it's app data, that should work and I won't have to worry about it updating behind my back. Any help appreciated.