I have had this problem for at least 4 months now. Everytime it begins scanning anything it stops and sends the “aunfortunately…has stopped working” message to me. I am running the full paid version of the app on my Samsung Galaxy S4. I have tried clearing the cache, reinstalling, etc. What’s wrong with the app I paid for? Also if I set it to do a full scan once a week, why is it still scanning all the time?
Hi mcordon.
Welcome to the Norton Community Forums. 
Sorry about the delayed response.
Under these circumstances I think I would suggest that you try uninstalling, rebooting and then re-installing NMS. If you do this, when you go through the re-registration process do not forget to select - I have already purchased this product.
Whether you decide to do that at the moment or not the following might be useful:-
Can I ask you to check you have the latest version of NMS - if you open the app, then select Menu - About. It should be something like V3.6.0.1056.
Under the Anti-Malware tab do you have the "Scan SD Card" ON or OFF? If it is ON try switching it to OFF for a while.
Can you tell us why you think it is scanning all the time?
I look forward to hearing back from you.
I already tried re installing 5 time before. Didn’t work this time either. The version is the latest version as you wrote. Keeping the sd card scan off does not make a difference.
My concern is that I paid for protection and its not protecting and it just stops working all the time and appears to scan all the time.
I wouldn’t know why it scans as I didn’t develop the app and the settings are set for only a 1 time a week scan.
not sure what to do.
Hi mcordon
Is it possible for you to shut down your device and remove your Micro SD memory
card if one is installed then restart without it installed and run a Norton Mobile Security
(NMS) manual scan and see if you get a error message.
Or just shut down the device and remove the Micro SD card then reinsert it and restart
and run a NMS manual scan to again see if you get a error message still or not.
Just a couple of tests to try.
Cheers. 
I tried and those didn’t help the issue 
If there is a virus or malware in my phone (I get a warning screen anytime I try to shop online) could that cause an issue with how it’s performing scans or lack of? How do I know if my phone is compromised and how do I get that Norton mobile working again? I am unhappy that this software isn’t free and isn’t working.
Hi mcordon
I can understand your frustration with a paid app as i think most Android
or iOS users would have had issues with some apps in the past. :(
Could you try another thing being uninstall NMS from your device then go
ahead and download again from the Google Play Store but this time skip
the sign in step and do not register or activate the full paid version of NMS.
Using the Lite free version run a manual LiveUpdate and then try to run a
manual scan.
Let us know how you go with that test please.
With the threat of a virus and the warning you seem to be getting exactly what
is the message that you get from NMS when doing online shopping.?
And what browser are you using when you these messages.? Android or Chrome.?
I am not sure if a NMS warning message would affect NMS scans.? It should
not i would think.
I will report this ongoing issue to the Norton Team to see if they could assist.
And with NMS and extra scans taking place this could be happening due to files
or folders being moved or renamed within the storage of the device.
Could that be the reason for you seeing extra scans in the NMS log.? Do you
perform those activities with a file explorer app or photo editing apps.?
Keep us posted. :)
Cheers.
Hi mccordon,
Your frustration is definitely warranted here, and we want to make sure we get the app working for you as soon as possible. I'm in the QA team for NMS, and I'll be helping facilitate things on this side. Smithy asks some very good questions that will (hopefully) help us narrow down what's going wrong on the S4, so I'm definitely interested in those responses.
For clarity, this is my understanding as the issue is currently. There's a few other items, but these were the important ones I pulled out...
1. NMS goes non-responsive, and Android throws a message as such whenever you scan.
2. You are seeing scans happen at a frequency more than what you expect (weekly).
Let me know if the above is correct, and please respond to smithy's post when you can. Thanks in advance!
Best Regards,
Brian Batovsky
NMS QA Team