run linux in a virtual machine on your windows operating system for all online work- much much less apt to get any kind of virus-
You can also run soemthign like sandboxie to isolate your browser from your OS- and delete everything when you go offline- if you get a virus i n the sandbox- oh well- the main operating system is safe supposedly-
Also- another good thing to run is RollBack RX- create a known good snapshot- after you have all your programs and setting set the way you like- if you get a virus- do a rollback- virus gone- even if windows won’t start- it loads before windows does- (You’ll just have to redo all your windows updates though-)
All that has to be done to disable Windows Defender is to convince the system that other anti-virus software is being used. System restore seems to be easy to screw up as well. The latest generations of malware is more than capable of defeating Microsoft's built in defenses. It is pathetic that Windows 10 is continually receiving disruptive updates that mess up your system supposedly in the name of security. My assumption in the past when a computer has been overheating while sitting idle has usually been that it is taking some type of cheesy update.