Are internet security programs like McAfee or Norton necessary

Absolutely.

>>60753998
not

those programs just slow your computer down doing needless disk scans and can do nothing against a program that you personally download and install.

use Common Sense 2017, Malwarebytes and MS Security Essentials/Win. Defender.
problem solved.

t. i sell antivirus every day

who invited this person here

No, don't call us again sir.

>>60753364
You should research how stuff works and then decide whether to ditch it or use it.
It doesn't matter if it is selinux, anti virus, firewalls, virtualization or whatever.
You should know what it is if you administrate a system you want to be secure.

There will never be a simple solution to security, there is no "install this application and you will be safe" ever.

>>60753364
No third party antivirus is required.

>Use ublock
>Use uMatrix
>For scanning files occasionally use virustotal.com

>>60755521
How do I set up uMatrix properly?

>>60755588
read the manual

Install Gentoo and you will never need an antivirus