If you ever wanted to change the DNS settings on Windows 7/8 here’s how you do it.
Open a command prompt with Administrator privileges, and type the following:
netsh interface ip set dns name="Wi-Fi" static 192.168.1.2
Secondary DNS:
netsh interface ip add dns name="Wi-Fi" 192.168.1.1index=2
If you want to change to use DHCP Server provided DNS do this:
netsh interface ip set dnsservers name="Wi-Fi" source=dhcp