I'll second Bitdefender (though not Kaspersky) if you
need antivirus.
There are some other generally good options out there -- ESET's popular in the corporate space, and ClamAV is still kind of the de facto www server standard (but also available on desktop cross-platform, and essentially free)
It may sound condescending, but I can't believe basic system security is something people still worry about these days. Over half the world's population is giving all their personal details to Google, Facebook/Instagram, Twitter, TikTok, Tinder, Robinhood, etc, and then shoveling the rest along to ChatGPT to do their jobs for them.
I'll just drop the obligatory "switch to Linux" PSA here.
Steam Deck runs Linux and it's not giving gamers any problems...
This is becoming an easier suggestion by the day.
Add a decent internal router and it'll take care of 9/10 of your virus concerns, upgrade your existing system to one that plays games better and faster than Windows (for the ones that will play), and put control and concern of your system's actual on-goings back into your hands.
These kinds of posts are like neighbors knocking at your door to ask if you have any idea why their burglar alarm went off. I intend this in the kindest way possible, but please take care of your own yard.
Windows has been a dumpster fire since the days of Vista --
or before that, Windows ME --
or remember the NT vs 2000 confusion?
Hell, some prominent hackers are still debating which is better, 95 or 98.
I understand why businesses are stuck with it.
But you're just kicking yourself in the face running Windows on a personal PC anymore.
Edit: Note: Cyberpunk 2077 runs great under Linux