Maybe there's some scenario I'm missing out on, but I've never had any issues just using Windows Defender.
That was irony :)
That was sarcasm. Irony is that you've confused one with the other :)
I'm sure he's being serious. I've stopped using other antivirus since Defender came on board. Whenever I buy a new laptop, the first thing I do is uninstall Norton and activate defender.
The guy kidding, was the one who wanted to install Kaspersky
uBlock Origin + Windows Defender = pretty good defence for people who don't click yes on everything that pops up
+ unchecky
It protects from toolbars, addons and other bundlewares of free software.