what samsung is doing?

[Sonukumar9]

Why we cant insatll apk file of any third party app
i dont know what they want to say
before that on marshmallow i can install apk
files but now after nougat update we cant install...

see friends I have attached a photo see what
happens when i try to install apk file....


My phone is J7 2016 model...

[Sonukumar9]

tell me what I can do..

[Corby]

disable screen filter app or uncheck Unknown Sources option

[admin_]

Thanks for Being a part of Samsung community. Would like to tell you Kindly follow the steps below to resolve your concern :-
1) Navigate to apps >> Settings >> Apps >> Tap on three dots >> Reset app preferences.
2) Please run your device in safe mode.
3) Please do reset your device on factory mode after taking the data backup Via Smart switch.