Plutonium

Turning off AVs is never a good thing, re-enable it and add Pluto to exclusions instead - https://plutonium.pw/docs/antivirus/#how-do-i-fix-this-windows-defender

Try changing your DNS (https://www.windowscentral.com/how-change-your-pcs-dns-settings-windows-10) or use a VPN.

Plastic Memories https://forum.plutonium.pw/topic/13711/make-is-so-you-can-see-and-join-own-dedicated-server-windows-only?_=1640545821388
so you can see it and join in sever list