Every time I restart my android 5 lollipop phone It auto enables
allow installation of apps from unknown sources option. I switch it off manually then in a few seconds a pop up for an unknown app to install shows and on the behind the
unknown sources button automatically toggles. This keeps on going forever. I haven't rooted my phone and have factory reset it many times. My phone is Xolo Era 4g.
Please tell a method to not allow any app to toggle the
unknown sources options on without rooting the phone, thanx.
Update: I first installed Antimalware app and when I run it, it found around 16 malwares, of which I deleted 14 but the there was no option to delete the last two. Then I installed the notification app. I restarted my phone. After that the internet automatically started. I immediately switched it off. Then I went to settings and switched off to allow unknown apps installation.
Then I opened menu and slide it a few times and the malware attacked again. Opening the settings disclosed that unknown apps installation is switched on. Many apps promoted for installation. After pressing cancel around 50 times I went to menu again and many new apps were installed. I have repeated this scenario two times once I switched internet on. But with internet off I saw apps installation prompt too. I don't remember with internet off whether the apps got actually installed or not.
Now I opened notification app and it showed one process having some text similar to Andriod UI lolipop 5.0, it had a lollipop icon to its left. On clicking on that it further showed one process the process was related to notification app itself and had text
toaster or may be
toasted. Now I have factory reset my phone again and have uninstalled all default apps like flipkart, snapdeal, payTM, UC browser etc. Now if I'll again restart my phone the virus will start again.