I Believe that the more you patch the more broken your computer will be in the future. I firmly Believe that any hole or bug currently being patched as not there at the start but was put in by the patch. If you patch you are adding holes and bugs that before you patches were not there. So if anyone out there can tell me what code was patched, I will be glad to check or provide my unpatched code and see any that bug on hole is there. Also if one has an extra computer, then leave it unpatched for one year and check the performance between the two computers. See if any holes or bugs are affecting your unpatched computer. I froze my w10 computer when I first got it 2 years ago and it has not updated or been updated since. I sure that a lot of the holes and bugs you are patching are not in my computer.
Also IMO most if not all virus enter the computer through user action. And all the antivirus put together will not stop a virus the user installed even unknowingly. Antivirus stop down performance and could be not worth it. If you safe computer then you do not need them. It been a long time since I heard about the background down loader (without doing any clicking but only using the arrow keys to move the page or maybe the mouse wheel) to which adds files to your computer while you are browsing. Any more any files that enter your computer come there because YOU installed a program that contained then. When you install a program, you have given a program the right to put files on your computer and in your registry. An antivirus can maybe prevent you from installing what it think is a virus but you do know that often antivirus get it wrong and label a good program as an evil one.
https://www.grownupgeek.com/safe_computing
IMO #1 and 2 do not matter
3)Use a secure web browser
4)Use a hardware or software firewall, or both
THE NEXT ONE IS IMO WHERE MOST VIRUS COME FROM
5)Do not install questionable software
6)Above all other rules of safe computing, the most important safe computing practice is DO NOT OPEN EMAIL ATTACHMENTS THAT YOU ARE NOT EXPECTING
FOLLOWING 5 and 6 should prevent 99% of virus