This situation may occur if you have enabled Advanced Protection in DFNDR’s anti-theft functions. Advanced Protection makes it impossible for malicious third-parties to uninstall or disable DFNDR on your device, making sure your device remains protected at all times. To disable Advanced Protection and remove DFNDR from your device, please follow the following steps (your device no longer will be protected):
Open the Settings of your device:
Then select “Security”:
Click “Device administrators”:
Click on the button and unable the DFNDR:
Select “Deactivate” and it’s ready.
Now you can uninstall normally through Google Play Store or your Application Manager.