Lenovo A6000 Phone Un-rooted Successfully.

I was using rooted Lenovo a6000 but now I have completely un-rooted my phone. The reason behind unrooting is related to some apps. Now-a-days a no. of apps don't run or start if the phone is rooted. I rooted my phone because I didn't like the pre-installed launcher, antivirus and some more systems apps and after removing these apps I made some apps as system apps. 

Kraft-A6000-S061-160727 Lenovo A6000 Software Update successfully downloaded

As in previous post I told that I  got notification for update Lenovo A6000 Software Update Kraft-A6000-S061-160727 and the size of this update was 84 MB. I tried to update my Lenovo A6000 yesterday The download of the software update was started slightly late but it was finished properly then asked to reboot the device. and I rebooted device the update was installing the bar was in mid but suddenly phone restarted.

I tried for many times but I am getting failed. Now I have successfully downloaded the update again but not installed. I want to install it manually but I am unable to find the location of downloaded update. I searched online and checked in Sd Card > lenovoota folder, Cache but didn't find. Also tried in Internal Storage > Android > data  but was unable to locate. After getting the downloaded update I will try to install in manually. If you have any idea where it can be? then Please suggest.