I use
Process Hacker 2, which is a powerful free and open source process viewer, and with it I can shut down every processes of my
BitDefender Total Security Suite without having to reboot and without having to be in SafeMode.
Iobit Game Booster is fine for normal processes but it can not shut down
BitDefender even if the choice is there to do it.
Also
Process Hacker 2 lets you deal with the services, and I mean all the services, not only those you see in the
Windows Services application. You will have guess that it is not a software to be used lightly.