Tablet is doing things on it's own.

My tablet is doing things on it's own.

How do I get rid of these two apps. Hot browser and adult gallery.

I have tried to manually uninstall them in settings but their is no uninstall button. I have tried app uninstaller but they don't show as an option. I have tried to reset to factory settings but they are still there. It's like they have some how intergrade with my tablet and have become a pre-installed system app. Help