But changing DNS server is a little tough task,By using DNS JUMPER you can change your Dns server on fly.It is a portable application which means it does not required any kind of installation.
DNS Jumper is a small application that aids the user by providing a one-click system to change DNS servers. The application displays a list of DNS servers that can be activated with the click of the mouse button. Available DNS server range from Google DNS over Open DNS to Ultra DNS, Level 3, Open NIC to the default DNS server of the system.
You will get 17 DNS servers means you have wide range to select DNS severs.
You may use following link to download DNS JUMPER:-