Go to the Control Panel.
Click Network and Internet > Network and Sharing Center > Change adapter settings.
Select the connection for which you want to configure Google Public DNS.
For example: - To change the settings for an Ethernet connection, right-click Local Area Connection > Properties. - To change the settings for a wireless connection, right-click Wireless Network Connection > Properties. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
Select the Networking tab. Under This connection uses the following items, select Internet Protocol Version 4 (TCP/IPv4) or Internet Protocol Version 6 (TCP/IPv6) and then click Properties.
Click Advanced and select the DNS tab. If there are any DNS server IP addresses listed there, write them down for future reference, and remove them from this window. Click OK.
Select Use the following DNS server addresses. If there are any IP addresses listed in the Preferred DNS server or Alternate DNS server, write them down for future reference.
Replace those addresses with the IP addresses of the Google DNS servers: For IPv4: 184.108.40.206 and/or 220.127.116.11.
Restart the connection you selected in step 3.
Open the Settings on the device.
Long press your current network, then select "Modify network".
Mark "Show advanced options" check box.
Change "IP settings" to "Static".
Scroll down and find DNS 1 and DNS 2. Set any DNS server addresses you prefer. Suppose, use Google DNS, type 18.104.22.168 in DNS 1 and 22.214.171.124 in DNS 2.
Press "Save" button.
Reconnect to Wi-Fi.
Download Public DNS Server Tool to your computer.
Unzip it to any folder you want on your hard disk.
Run Public DNS Server Tool by double-clicking on PublicDNS.exe. Since this tool makes changes to your DNS server settings, it requires administrator privileges. If you are running Windows XP, then you should be logged in as an administrator. If you are running Windows Vista, Windows 7, Windows 8 or Windows 10, then you will be shown UAC (User Account Control) and would be asked to provide administrator login.
First of all backup your current DNS servers by selecting Backup → Backup from the menubar. This is very useful if you later want to restore your original DNS servers.
Choose your Network Interface Card (NIC) from the dropdown list box. If you have only one NIC, then it will be pre-selected. As you select a NIC card, the current DNS server configured for the selected NIC would be shown in big blue text. You can select the checkbox labeled Select all to select all the NIC cards in your system.
Choose a set of public DNS servers from the list. As you select a DNS server, their description would be visible below the list. From the description, you can learn about what benefits a DNS server provides. The website of the selected DNS server is also given.
Finally, click on the Change button at the bottom of the window. It would take a few seconds to change the DNS servers. If even after changing the DNS servers, you see your browser using previous DNS servers, then either press Ctrl + F5 to reload the webpage or restart your web browser.
Launch the DNS Changer app.
Choose a DNS provider (Default Google DNS)
Press Start button.