Right-click the Windows Start button (lower left corner of Windows desktop), and select “Network Connections”:
Then in the “Network Connections” window, right-click your primary network connection, and select “Properties”:
Select the “Internet Protocol Version 4 (TCP/IPv4)” item, and click the “Properties” button:
Check “Use the following DNS server addresses” and enter the IP address of the two nearest DNSFlex DNS servers in the Preferred and Alternate DNS server field respectively:
Finally click the “OK” button in this and the previous dialog to save your changes.