A number of people have encountered a pop-up message on the Note 3 with the header “Prevention information.” It goes on to say “An application has been forced to stop for an unauthorized attempt to access system in your device. It may be safe to delete an application obtained from an unauthorized route. Check now?” and there’s an option to “not show for 30 days.” You can cancel out or click OK, which takes you to your list of apps. Some people report getting this message without installing any apps from unknown sources and it seems to be some kind of bug or false positive rather than an actual issue with an unsafe app.
- Long press on the message and select App info, which should take you to Knox Notification Manager. Try clearing the data and cache, then go to Settings > General > Security and make sure that Unknown sources is not ticked. If you reboot the phone the message might come back.
- You could disable Knox or disable the notifications from Knox, but you’ll probably need to root your Note 3 and freeze a number of apps and services related to it for that to work, and it means you won’t potentially benefit from the security it’s supposed to provide.
- You should get an update to fix this OTA, but it depends on your carrier. You can always check by going to Settings > About phone > Software update.