Lock Booster app is not getting uninstalled

[AC Question]

I am using Micromax A106 mobile. One year back I installed Lock Booster app and found it's absolutely useless, so uninstalled it. But it is not going away. On every bootup of the mobile, it comes back. I even reset it back to the factory setting, but no use. Developer also refused to provide any help. Any idea any one how to get rid of this Lock Booster app?

 

[B. Diddy]

Welcome to Android Central! Go to Settings>Security>Device Administrators​, and see if it's listed there. If so, uncheck it first, then uninstall it.