Set or Change DNS Server in Windows 7/8/10 using Command Prompt

 First, run command prompt as administrator, then type the following command and press enter for each line :

netsh interface ipv4 set dnsservers "Local Area Connection" static 8.8.8.8 primary
netsh interface ipv4 add dnsserver "Local Area Connection" 8.8.4.4 index=2

Note :

- Change 8.8.8.8 or 8.8.4.4 with your DNS Server.

- First line is to set or change primary / preferred dns server.

- Second line is to add secondary / alternate dns server.

- Change "Local Area Connection" with your machine's interface name.To find the name of interface use the following command :

netsh interface show interface

or

netsh interface ipv4 show config

If you want to set obtain DNS Server address automatically, use the following command :

netsh interface ipv4 set dnsservers "Local Area Connection" dhcp