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 ?
The 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:
nslookup doubleclick.com
But you missed posting DNS servers from the ipconfig /all
output on the Windows box ?
And what bout below one ?