セキュアな「DNS」を選択する。
① AdGuard DNS
Remones ads and protects your device from malware.
https://kb.adguard.com/en/dns
AdGuard | Wikipedia
https://en.wikipedia.org/wiki/AdGuard

② Cloudflare Anti-malware DNS
Anti-malware DNS server by Cloudflare that blocks malicious domains
https://www.cloudflare.com/dns/
Cloudflare | Wikipedia
https://en.wikipedia.org/wiki/Cloudflare

③ Cisco OpenDNS
DNS server that protects your device from malware
https://www.opendns.com/
OpenDNS | Wikipedia
https://en.wikipedia.org/wiki/OpenDNS

④ Quad9
Free alternative DNS server with protection from phishing and spyware
https://quad9.net/
Quad9 | Wikipedia
https://en.wikipedia.org/wiki/Quad9

また「AdGuard for Windows」は有償ですが、巷の AV よりも実用的です。
Ad Blocker for Windows by AdGuard: remove all ads forever | AdGuard
https://adguard.com/en/adguard-windows/overview.html