This bit shows your Windows client still got its IP details via DHCP from the router.
Are you sure the routers DHCP service is disabled ?
What is results now on Pi-hole for below one ?
sudo nmap -sU -p67 --script dhcp-discover 192.168.1.1
And maybe reboot the Windows box to be sure it renews its DHCP lease ?
nslookup output looks good.
If you run below one targeting a naughty domain on the Pi-hole blocklist, you'll notice the IP address gets redirected to
0.0.0.0 instead of the real actual IP address for that domain:
But you missed posting DNS servers from the
ipconfig /all output on the Windows box ?
And what bout below one ?