Hello, I can't advise any antivirus, but i can tell you what i do.
Just use Malwarebyte the free version. and do a scan from time to time. also have ccleaner (and clean from time to time), and if you really want to be secure download a firefall (other than the windows firewall).
And you'll need common sense to not download crap from the web :)
If you really want to download and test things that can do bad things to your computer, do it on a VM with vmware.
If you really want an antivirus, go for avast the free version. They have a bad reputation from 10 years ago when they were absolute crap, but now it's a good free antivirus.