As NamMewdevac implies the best security is what I call the ONION system.
Like an onion it is layer upon layer upon layer
A good firewall (I have one of the best)
A good anti-malware FULL TIME live
A 2nd and even a 3rd anti-malware one of which is on "External" media (USB stick)
I have had malware get past one or two. but not often the 3rd or 4th.
You also need to update your wetware (Brain) You get a pop up "Your computer is locked" or a message "your account is (or will be) Suspended..... DO NOT CLICK ON ANY LINK IN THE POP UP OR MESSAGE.
That first one can be a type B Itch to get rid of.. I've had to force shut down of the conmptuer then run a scan (Clean) on restart.
IF you get message about say your Amazon account.. manually type Amazon.com or click on an existing link in your BOOKMARK list. DO NOT click on the linke the scammer provides.
This is Bank of America Security and we are having a problem accessing your account to fix a problem, click on the link below and log in....
(Actual scam letter) Yup. they are still having a problem logging into my account. (It was closed like 5 years before I got the scam letter. I can't log into it either, made it easy to spot as a scam)
And no, I've not been charged on my Amazon Linked card for a new I-phone (For one thing i don't have a default card on Amazon)
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times