[Solved] Various Issues after re-install

[DanSchaper]

@Braunson

DNS Servers . . . . . . . . . . . : 192.168.1.51
                                    192.168.1.1

That's the problem. The router (DHCP Server) is sending itself as a DNS server. Windows will use both DNS servers, there is no primary and secondary or backup DNS servers.

Why should Pi-hole be my only DNS server?

Reduced Ad Blocking Capability The main reason you should Pi-hole as your only DNS server is that you will see increased performance in the blocking of ads. If you have two DNS servers (Pi-hole and something else), your network clients may not always query Pi-hole for name resolution. If a query happens to be answered from a non-Pi-hole DNS server, your block lists will not apply (since that DNS server doesn't know about them). All Queries Need To Go Through Pi-hole First Since other DNS serv…