Before I start, how does Defender "kick in"?
Is it an automatic thing?
I must admit, I don't understand why Dell stick to this company. It's always there when you buy a new computer and always part of the initial set up. On my older computers in the past, it has always been the main perpetrator when everything slows down to snail's pace!
I always used the used the MS supplied Microsoft Security Essentials with my Windows 7 computer. It seemed to do the job but it didn't prevent a ransomware attack I experienced just after my heart surgery in 2016. That really buggered me up!
I can't remember now but I thought I actually had to download MSE, it wasn't a default thing.