Ixamyakxim: on a ~23 inch monitor I think?
Size doesn't matter :P /s
Actually there is one thing A LOT (well MOST) people overlook and that would be antivirus.
When I still used windows I have used and tested a pletora of antivirus software and quite frankly all of them were $hit in terms of overhead. I personally used AVG, Avast, McAfee (back in the day when it was SLOW AS F*CK), Comodo, Bitdefender (for a long time), and probably some other stuff I don't remember. On not mine hardware I dealt with all of those plus ESET, Kaspersky, Trend Micro, Avira and other stuff.
All of them are really bad if you don't change default settings but people don't seem to realise that.
If you leave settings at default sooner or later you will drive into the kind of wall that will make you rage.
Do you want to deadlock your computer? Well then don't create on access scanning exclusion for World of Tanks diretory and (World of Tanks related) archive formats while running Bitdefender ;) (true story, I know because I learned the hard way)
Comodo used to throw at me left right and center all the time false positives even about very simple C++ programs.
Avast is generally known to be crap.
McAfee AT THIS POINT is the general story of "oh you didn't know I got preinstalled on your windows laptop? Well then let me take your precious resources" and it's not good at all anyway.
Kaspersky throws very BS false positives about legitimate software while neglecting some actual bad code. It also does a lot of "suspicious stuff" and generally it is not safe.
You know I had a lot of experience with all kinds of BS (I actually tend to break software even if I'm not trying, even software that is considered stable and patched for years, I just find bugs out of the blue) and at this point if somebody would ask me what is good av software for windows I would probably respond with NONE.
It really is that if somebody absolutely has to use windows for whatever reason and they need av software then they should use completely other methods opposing what is advertised and recommended and they should completely refactor their threat models and responses to it.
I'm sorry for this lenghty off branch of this conversation.
My point is that if you use ANY av software (that includes windows built in too) then you should manually add on access scanning exclusions for all your game directories, some file formats related to those and a bunch of other stuff. When I used Bitdefender I had probably more than 20 of those (out of which I did not pick each game folders just one collective folder for all of them so yeah I had these for other stuff too). If you don't it is gonna make your life hard.
And you know - if you have problems with some game it very well maybe a case of exactly problems with av slowing you down while scanning unnecesary stuff ;)