I installed a memory booster/ security device on my Samsung recently. I have always wondered if I actually need all this hardware and apps in my phone. Now it tells me I can uninstall some apps , when I go to do it my phone says unable to no root system. What do I do?
Firstly, I agree with @user2813274. You should be very careful about what you try to uninstall as things can go badly wrong.
To answer your question of what to do:
You need to grant the app root privileges.
To uninstall system apps
root access is required, which is in basic terms, elevated permissions. The app you have installed is unable to remove some of the apps because they are system apps and it lacks the necessary permissions to do so.
If you need help rooting your device I would check on XDA Developers for instructions specific to your device.