Quad9 is a free security solution that uses DNS to protect your systems against the most common cyber threats.
You can setup Quad9 on PC in four easy steps.
Open Control Panel, select Network and Internet, and then select Network and Sharing Center. Click Change adapter settings on the left pane.
Right click the network interface connected to the internet, and select Properties. Select Internet Protocol Version 4 (TCP/IPv4) from the list and click Properties.
Select “Use the following DNS server addresses” and type 220.127.116.11 into the Preferred DNS server box. For the Alternative DNS server type 18.104.22.168
Click OK then Close to save your settings.