there are ways to get around requesting human authentication for processes. Zero days / exploits, malvertising, port exploitation, etcit's not typically(key word) present on a machine that is kept 100% up-to-date, but it is always possible that even something legitimate you installed may not be correctly secured and may accidentally backdoor your system because of legacy code or bad practices.
anti virus software will not protect you from good zero day exploits
do not JUST use malware bytes, good practice is to have both malwarebytes and a decent av software. AVG, avast, bitdefender, ect
That only works if you decide to never go on the internet. There's stuff on perfectly legit websites that the website owners don't have control over that can give you viruses. I've not been on any sketchy sites and Avast picked something up just a while ago on the forums. Don't even know what it was, just something about an image. Might've been another site in the background but again, I wasn't on a sketchy site.I use avast and would like to switch though
do you even know how a virus works
I use Windows Defender (lol) and Malwarebytes