Removing DNS settings from your Windows 7 computer
Go to Start > Control Panel > Network and Internet and click on Network and Sharing Center .
Click on Change adapter settings.
Right click on your active network adapter (Local Area Connection or Wireless Network Connection) and select Properties.
Double click on Internet Protocol Version 4 (TCP/IPv4).
In the General tab, click on 'Obtain DNS server addresses automatically' and click OK.
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