perhaps some tin foil placed across your mouse and keyboard will help the most in addition to your battery of snakeoil treatment
I wipe my keyboard daily with antibacterial wipes, though sadly they're not effective against viruses.
if you have some doubts about a site or a exe, just ask to cortana, she is listening and taking samples or everything.
haven't used any software firewall, antivirus or other things like windows defender. only malware bytes is installed for a few scans from now to then, that's it. never had any problems but i agree some people in here or in general (like my gf) should use something like this. because without it they would be lost as hell and full of viruses trojans and other crap. we call them "DAU" in germany
Cortana: "I don't know if the file has virus but don't worry let's open it and find out." **10 seconds later** Windows: "Cortana and Anti-Malware protection has suddenly stopped working." User:
You better add another layer, when they can use a wormhole to travel, they don't look for sheep to learn from, they look for more intelligent beings..