android 5.1.x security settings missing after upgrade A friend of mine asked me for help, she currently uses a Samsung phone with android 5.1.1 and misses settings for virus security and cpu in the main settings UI. The "virus" alert should be something with red/yellow/green indicators, she said. Also there should be some settings concerning the operationg system. 
The change happened during an upgrade I guess. 

I cannot figure out what she is speaking about, I have been using a Galaxy 2 and 4 up to now, currently running with 5.0.1 

Do you have any idea what I could search for? 

I also like to ask if you know an app (no root) for these security issues!?
Based on on description, I think you might be referring to Samsung's Smart Manger. Smart manager gives an overview of the device's RAM, Battery, Clean up as well as Security (contains sn anti-malware engine).


  Smart Manager's functions are to manage storage and RAM, scan and
  optimize data usage to preserve battery levels, and protect from
  security threats, close all apps running in the background that
  significantly drain the battery, uninstall unneeded applications, and
  run malware scans.


See below:



It is most likely the OS update didn't have Smart Manager. However the good thing is Smart Manager has been renamed Device Maintenance and is available from Google Playstore as long the device is compatible