Reliable and Thorough: It takes all popular rooting tools into consideration and remove all leftovers of them.Remove Root via Kingo Android Root (PC Version) There are two ways to completely remove root-related files and all. So basically, if you want to update your device via OTA, you may need to completely remove the residual files (including all su binary files and superuser apk).

It depends on the tool you have used to root your device. It is not necessarily in all of these directories.

/system/app: superuser.apk or the apk of any other management tool.

/system/sbin: su binary (may not be necessary).

/system/xbin: tmpsu, daemonsu (may not be necessary).

After having accessed to your system partition, certain su binary files and superuser app will be placed in it. It means that your device is being rooted by them exploit certain system vulnerabilities. KingoRoot, along with any other one-click root tools, are all exploit-based. After rooting, what has been added to your Android System? Because when you try to update your system via OTA, it will first check your system and make sure it hasn't been altered at all. Rooting, in fact, is a process of tampering your Android system, which will lead to OTA update failure. One of them is failing to update through OTA. Getting your Android device rooted with KingoRoot (or any other root tools) surely has its benefits, and yet with risks and consequences as well.

Kingo root superuser apk